Citric Acid Anhydrous CAS 77-92-9 Kev Ntsuam Xyuas 99.5 ~ 100.5%
Shanghai Ruifu Tshuaj Co., Ltd.Ruifu Chemical tuaj yeem muab kev xa khoom thoob ntiaj teb, tus nqi sib tw, kev pabcuam zoo heev, me me thiab ntau ntau muaj.Yuav Citric Acid Anhydrous,Please contact: alvin@ruifuchem.com
| Tshuaj npe | Citric Acid Anhydrous |
| Synonyms | 2-Hydroxy-1,2,3-Propanetricarboxylic Acid;2-Hydroxypropan-1,2,3-Tricarboxylic Acid;2-Hydroxypropane-1,2,3-Tricarboxylate |
| Tshuag xwm txheej | Tej Tshuag, Kev Muag Khoom Muag |
| CAS Nr | 77-92-9 ib |
| Molecular Formula | c6h8o 7 |
| Molecular Luj | 192.12 g / mol |
| Melting Point | 153.0 ~ 159.0 ℃ (lit.) |
| Qhov ntom | 1.67 g / cm3 ntawm 20 ℃ |
| Refractive Index n20/D | 1.493-1.509 Nws |
| rhiab heev | Hygroscopic |
| Dej Solubility | Soluble hauv dej, 590 g / l 20 ℃ |
| Solubility hauv Methanol | Yuav luag Transparency |
| Solubility | Soluble heev hauv Ethanol;Soluble hauv Ether;Insoluble hauv Chloroform, Benzene |
| tsw | Tsis hnov tsw |
| Kev ruaj ntseg | ruaj khov.Incompatible nrog Bases, Muaj zog Oxidizing Agents, Txo cov neeg sawv cev, Hlau Nitrates |
| COA & MSDS | Muaj |
| Qauv | Muaj |
| Keeb kwm | Shanghai, Suav |
| Yam khoom | Khoom noj khoom haus additives |
| Hom | Ruifu Tshuaj |
| Cov khoom | Kev soj ntsuam Standards | Cov txiaj ntsig |
| Qhov tshwm sim | Dawb Crystalline hmoov los yog tsis muaj xim muaju | Ua raws |
| Lub teeb Transmittance | ≥96.0% | 99.0% |
| Dej los ntawm Karl Fischer | ≤0.50% | 0.2% |
| Insoluble Matter hauv H2O | ≤ 0.005% | <0.005% |
| Ignition Residue (raws li Sulfate) | ≤ 0.02% | <0.02% |
| Npaj Carbonizable Khoom | ≤ 1.00% | 0.42% |
| Sulfated tshauv | ≤ 0.05% | <0.05% |
| Chloride (Cl-) | ≤ 0.005% | <0.005% |
| Sulfate (SO42-) | ≤ 0.01% | <0.002% |
| Oxalate (raws li Oxalic Acid) | ≤ 0.01% | <0.01% |
| Calcium ntsev | ≤ 0.02% | <0.02% |
| Hlau (Fe) | ≤ 5mg / kg | <5mg/kg |
| Arsenic ntsev | ≤ 1mg / kg | <1mg/kg |
| Lead (Pb) | ≤0.5mg / kg | <0.5mg/kg |
| Phospate (PO4) | ≤ 0.001% | <0.001% |
| Assay | 99.5% ~ 100.5% | 99.81% |
| Infrared Spectrum | Raws li tus qauv | Ua raws |
| Xaus | Cov khoom tau raug kuaj & ua raws li tus qauv ntawm GB1987-2007 | |
| Txee lub neej | 2 Xyoos txij hnub tsim khoom yog tias khaws cia kom raug | |
Pob:Lub raj mis, Aluminium ntawv ci hnab, 25 kg multiply hnab ntawv nrog PE-Inliner, 25kg / cardboard nruas, los yog raws li tus neeg yuav tsum tau muaj.
Cia txias:Khaws lub thawv kaw kom nruj thiab khaws cia rau hauv qhov chaw txias, qhuav thiab zoo-ventilated warehouse kom deb ntawm cov khoom tsis sib xws.Nyob deb ntawm lub hnub ncaj qha thiab dej.
Shipping:Xa mus thoob ntiaj teb los ntawm huab cua, los ntawm FedEx / DHL Express.Muab kev xa khoom sai thiab txhim khu kev qha.
Citric acid [77-92-9].
DEFINITION
Anhydrous Citric Acid muaj NLT 99.5% thiab NMT 100.5% ntawm C6H8O7, xam los ntawm lub hauv paus anhydrous.
IDENTIFICATION
• Infrared Absorption <197K>: Qhuav cov tshuaj yuav tsum tau kuaj ntawm 105 ℃ rau 2 h.
QHIA
• Cov txheej txheem
Qauv: 0.550 g ntawm Anhydrous Citric Acid;sau qhov hnyav kom raug.
Kev Ntsuas: Dissolve cov qauv hauv 50 mL dej.Ntxiv 0.5 mL ntawm phenolphthalein TS.Titrate nrog 1 N sodium hydroxide VS.Txhua mL ntawm 1 N sodium hydroxide yog sib npaug rau 64.03 mg ntawm C6H8O7.
Kev lees txais cov qauv: 99.5% -100.5% ntawm lub hauv paus anhydrous
IMPURITIES
Inorganic impurities
• Residue ntawm Ignition <281>: NMT 0.1%, txiav txim siab ntawm 1.0 g
• Heavy Metals <231>: NMT 10 ppm
• Sulfate
Txheem sulfate tov A: 1.81 mg / mL ntawm poov tshuaj sulfate hauv 30% cawv.Tam sim ntawd ua ntej siv, hloov 10.0 mL ntawm cov tshuaj no mus rau 1000-mL volumetric hwj, dilute nrog 30% cawv rau ntim, thiab sib tov.Cov tshuaj no muaj 10 μg / mL ntawm sulfate.
Txheem sulfate tov B: 1.81 mg / mL ntawm poov tshuaj sulfate hauv dej.Tam sim ntawd ua ntej siv, hloov 10.0 mL ntawm cov tshuaj no mus rau 1000-mL volumetric hwj, dilute nrog dej rau ntim, thiab sib tov.Cov tshuaj no muaj 10 μg / mL ntawm sulfate.
Cov qauv hauv Tshuag: 66.7 mg / mL ntawm citric acid
Piv txwv li: Rau 4.5 mL ntawm Standard sulfate tov A, ntxiv 3 mL ntawm barium chloride tov (1 nyob rau hauv 4), co, thiab cia sawv ntsug rau 1 min.Rau 2.5 mL ntawm qhov tshwm sim raug tshem tawm, ntxiv 15 mL ntawm Sample Tshuag tov thiab 0.5 mL ntawm 5 N acetic acid, thiab sib tov.
Standard tov: Npaj raws li qhia rau cov qauv tov, tshwj tsis yog siv 15 mL ntawm Standard sulfate tov B es tsis txhob ntawm cov qauv Tshuag tov.
Kev tsom xam
Qauv: Cov qauv kev daws teeb meem thiab cov qauv kev daws teeb meem
Kev lees txais cov txheej txheem: Txhua qhov turbidity tsim nyob rau hauv cov qauv kev daws teeb meem tom qab 5 min sawv tsis ntau tshaj qhov uas tau tsim nyob rau hauv Standard tov (0.015%).
• Txwv ntawm Aluminium (qhov twg nws tau sau npe raws li kev npaj rau kev lim ntshav)
Standard aluminium tov: Rau 352 mg ntawm txhuas poov tshuaj sulfate nyob rau hauv 100-mL volumetric hwj, ntxiv ob peb mL dej, swirl rau yaj, ntxiv 10 mL ntawm diluted sulfuric acid, dilute nrog dej rau ntim, thiab sib tov.Tam sim ntawd ua ntej siv, dilute 1.0 mL ntawm cov tshuaj no nrog dej rau 100.0 mL.
pH 6.0 acetate buffer: Dissolve 50 g ntawm ammonium acetate hauv 150 mL dej, kho nrog glacial acetic acid rau pH ntawm 6.0, dilute nrog dej mus rau 250 mL, thiab sib tov.
Standard tov: Npaj ib tug sib tov ntawm 2.0 mL ntawm Standard txhuas tov, 10 mL ntawm pH 6.0 acetate buffer, thiab 98 mL dej.Extract cov sib tov no raws li tau piav qhia rau cov qauv kev daws teeb meem, dilute cov sib xyaw ua ke nrog chloroform rau ntim, thiab sib tov.
Piv txwv li: Dissolve 20.0 g ntawm Anhydrous Citric Acid hauv 100 mL dej, thiab ntxiv 10 mL ntawm pH 6.0 acetate buffer.Extract cov tshuaj no nrog rau feem ntawm 20, 20, thiab 10 mL ntawm 0.5% tov ntawm 8-hydroxyquinoline hauv chloroform, sib txuas cov chloroform rho tawm hauv 50-mL ntim ntim.Dilute cov sib xyaw extracts nrog chloroform rau ntim, thiab sib tov.
Cov tshuaj dawb: Npaj ib qho sib tov ntawm 10 mL ntawm pH 6.0 acetate buffer thiab 100 mL dej.Extract cov sib tov no raws li tau piav qhia rau cov qauv kev daws teeb meem, dilute cov sib xyaw ua ke nrog chloroform rau ntim, thiab sib tov.
Fluorometric tej yam kev mob
Kev tawm suab wavelength: 392 nm
Emission wavelength: 518nm
Kev tsom xam
Qauv: Cov qauv kev daws teeb meem thiab cov qauv kev daws teeb meem
Txiav txim siab qhov fluorescence intensities ntawm cov qauv hauv ib lub fluorometer teem raws li qhia nyob rau hauv Fluorometric tej yam kev mob, siv lub Blank tov los teem lub ntsuas rau xoom.
Kev lees txais cov qauv: Cov fluorescence ntawm cov qauv kev daws teeb meem tsis pub dhau qhov kev daws teeb meem (0.2 ppm).
Organic impurities
• Cov txheej txheem: txwv ntawm Oxalic Acid
Piv txwv cov tshuaj: 200 mg / mL ntawm Anhydrous Citric Acid hauv dej
Piv txwv li: Rau 4 mL ntawm cov qauv Tshuag tov ntxiv 3 mL ntawm hydrochloric acid thiab 1 g ntawm granular zinc, boil rau 1 min, thiab cia sawv ntsug rau 2 min.Hloov cov supernatant mus rau ib lub raj tshuaj uas muaj 0.25 mL ntawm phenylhydrazine hydrochloride tov (1 ntawm 100), thiab kub rau boiling.Txias sai sai, hloov mus rau ib lub tog raj kheej kawm tiav, thiab ntxiv cov ntim sib npaug ntawm hydrochloric acid thiab 0.25 mL ntawm cov tshuaj potassium ferricyanide (1 ntawm 20).Do, thiab cia sawv ntsug rau 30 feeb.
Cov txheej txheem kev daws teeb meem: Npaj raws li cov lus qhia rau cov qauv kev daws teeb meem, tshwj tsis yog siv 4 mL ntawm 0.10 mg / mL oxalic acid tov, sib npaug rau 0.0714 mg / mL ntawm anhydrous oxalic acid, es tsis txhob siv cov tshuaj hauv Tshuag.[Ceeb Toom—Npaj ua ke nrog cov qauv kev daws teeb meem.]
Kev tsom xam
Qauv: Cov qauv kev daws teeb meem thiab cov qauv kev daws teeb meem
Kev lees txais cov qauv: Txhua xim liab uas ua rau hauv cov qauv kev daws teeb meem tsis yog khaus ntau tshaj qhov uas ua rau hauv Cov Txheej Txheem (0.036%).
TSEEM CEEB
• Bacterial Endotoxins Test 85: Cov theem ntawm cov kab mob endotoxins yog xws li qhov yuav tsum tau muaj nyob rau hauv cov ntaub ntawv muaj feem xyuam rau daim ntawv monograph (s) uas Anhydrous Citric Acid yog siv tau.Qhov twg daim ntawv lo hais tias Anhydrous Citric Acid yuav tsum tau ua ntxiv thaum lub sij hawm npaj cov tshuaj txhaj tshuaj, theem ntawm cov kab mob endotoxins yog xws li qhov yuav tsum tau muaj nyob rau hauv daim ntawv ntau npaum li cas monograph (s) uas Anhydrous Citric Acid yog siv tau. ntsib.
• Clarity of Solution
[Ceeb Toom-Cov qauv tshuaj yog muab piv rau Standard ncua kev kawm ntawv A nyob rau hauv diffused nruab hnub nrig 5 min tom qab kev npaj ntawm Standard ncua kev kawm ntawv A.]
Hydrazine sulfate daws: 10 mg / mL ntawm hydrazine sulfate hauv dej.Cia sawv ntsug li 4 mus rau 6 teev ua ntej siv.
Cov tshuaj Methenamine: Hloov 2.5 g ntawm methenamine mus rau 100-mL iav-stoppered khob, ntxiv 25.0 mL dej, ntxig rau iav stopper, thiab sib tov kom yaj.
Thawj opalescent ncua kev kawm ntawv: Hloov 25.0 mL ntawm Hydrazine sulfate tov rau 25.0 mL ntawm Methenamine tov nyob rau hauv 100-mL iav-stoppered hwj.Sib tov, thiab cia sawv ntsug rau 24 teev.[Ceeb Toom—Qhov kev ncua no ruaj khov rau 2 lub hlis, yog tias nws tau khaws cia rau hauv lub khob iav tsis muaj qhov tsis xws luag.Lub ncua kev kawm ntawv yuav tsum tsis txhob ua raws li cov iav thiab yuav tsum tau zoo sib tov ua ntej siv.]
Opalescence standard: Dilute 15.0 mL ntawm Thawj opalescent suspension nrog dej mus rau 1000 mL.[Ceeb Toom—Qhov kev ncua yuav tsum tsis txhob siv dhau 24 teev tom qab kev npaj.]
Txheem ncua kev kawm A: Dilute 5.0 mL ntawm Opalescence txuj nrog dej rau 100 mL.
Txheem ncua kev kawm B: Dilute 10.0 mL ntawm Opalescence txheem nrog dej mus rau 100 mL.
Piv txwv li: 200 mg / mL ntawm Anhydrous Citric Acid hauv dej
Kev tsom xam
Qauv: Txheem ncua kev kawm A, Standard suspension B, dej, thiab Sample tov
Hloov ib feem txaus ntawm cov qauv kev daws teeb meem mus rau ib lub raj uas tsis muaj xim, pob tshab, nruab nrab iav nrog lub hauv paus tiaj tus thiab ib txoj kab uas hla ntawm 15-25 hli kom tau qhov tob ntawm 40 hli.Ib yam li kev hloov pauv ntawm Standard ncua kev kawm ntawv A, Standard ncua kev kawm ntawv B, thiab dej mus cais cov sib txuam xeem tubs.Sib piv cov qauv kev daws teeb meem, Standard ncua kev kawm A, Standard ncua kev kawm B, thiab dej nyob rau hauv diffused nruab hnub nrig, saib vertically tiv thaiv ib tug dub keeb kwm yav dhau (saib Spectrophotometry thiab Light-Scattering 851, Visual Comparison).[Ceeb Toom—Qhov kev nthuav tawm ntawm lub teeb yuav tsum yog qhov uas Standard suspension A tuaj yeem sib txawv ntawm cov dej, thiab qhov kev ncua B tuaj yeem sib txawv ntawm Standard suspension A.]
Kev lees txais cov qauv: Cov qauv kev daws teeb meem qhia pom qhov tseeb tib yam li cov dej.
• Xim tshuaj
Standard Tshuag tov A: Ferric chloride CS, cobaltous chloride CS, thiab dilute hydrochloric acid (10 g / L) (2.4: 0.6: 7.0)
Standard Tshuag tov B: Ferric chloride CS, cobaltous chloride CS, khob sulfate CS, thiab dilute hydrochloric acid (10 g / L) (2.4: 1.0: 0.4: 6.2)
Standard Tshuag tov C: Ferric chloride CS, cobaltous chloride CS, thiab cupric sulfate CS (9.6: 0.2: 0.2)
[Ceeb Toom- Npaj cov txheej txheem kev daws teeb meem tam sim ua ntej siv.]
Standard tov A: Dilute 2.5 mL ntawm Standard Tshuag tov A nrog dilute hydrochloric acid (10 g / L) rau 100 mL.
Standard tov B: Dilute 2.5 mL ntawm Standard Tshuag tov B nrog dilute hydrochloric acid rau (10 g / L) 100 mL.
Standard tov C: Dilute 0.75 mL ntawm Standard Tshuag tov C nrog dilute hydrochloric acid (10 g / L) rau 100 mL.
Cov qauv kev daws teeb meem: Siv cov qauv kev daws teeb meem npaj raws li qhia hauv qhov kev sim rau Clarity of Solution.
Kev tsom xam
Qauv: Standard tov A, Standard tov B, Standard tov C, dej, thiab Sample tov
Hloov ib feem txaus ntawm cov qauv kev daws teeb meem mus rau ib lub raj uas tsis muaj xim, pob tshab, nruab nrab iav nrog lub hauv paus tiaj tus thiab ib txoj kab uas hla ntawm 15-25 hli kom tau qhov tob ntawm 40 hli.Ib yam li cov kev hloov pauv ntawm Standard tov A, Standard tov B, Standard tov C, thiab dej mus cais cov khoom sib txuam.Sib piv cov qauv tshuaj, Standard tov A, Standard tov B, Standard tov C, thiab dej nyob rau hauv diffused nruab hnub nrig, saib vertically tiv thaiv ib tug dawb keeb kwm yav dhau (saib Spectrophotometry thiab Light-Scattering 851, Visual Comparison).
Kev lees txais cov qauv: Cov qauv kev daws teeb meem tsis yog xim xim ntau dua li cov qauv tshuaj A, B, lossis C, lossis dej.
• Yooj yim Carbonizable Tshuaj
Qauv: 1.0 g ntawm hmoov Anhydrous Citric Acid
Kev Ntsuam Xyuas: Hloov cov qauv mus rau 22- × 175-mm xeem raj yav tas los yaug nrog 10 mL ntawm sulfuric acid thiab tso cai rau ntws rau 10 min.Ntxiv 10 mL ntawm sulfuric acid, agitate kom txog thaum tov tiav, thiab raus hauv ib da dej ntawm 90 ± 1 rau 60 ± 0.5 min, ua kom cov qib ntawm cov kua qaub qis dua cov dej hauv lub sijhawm tag nrho.Txias lub raj hauv dej ntws, thiab hloov cov kua qaub rau hauv cov xim sib piv.
Kev lees txais cov qauv: Cov xim ntawm cov kua qaub tsis yog tsaus dua li qhov ntim zoo sib xws ntawm Matching Fluid K (saib Xim thiab Achromicity 631) nyob rau hauv cov raj sib txuam, cov hlab tau raug soj ntsuam vertically tiv thaiv tom qab dawb.
• Sterility Tests 71: Nyob qhov twg daim ntawv lo hais tias Anhydrous Citric Acid yog tsis muaj menyuam, nws ua tau raws li qhov yuav tsum tau muaj rau Sterility Tests 71 nyob rau hauv daim ntawv muaj feem ntau npaum li cas monograph uas Anhydrous Citric Acid yog siv.
• Kev Txiav Txim Dej, Txoj Kev I 921: NMT 1.0%
TSEEM CEEB
• Ntim thiab Cia: Khaws rau hauv cov thawv nruj.Tsis muaj qhov yuav tsum tau khaws cia.
• Labeling: Qhov twg nws yog npaj rau siv nyob rau hauv cov tshuaj dialysis, nws yog li ntawd daim ntawv lo.Qhov twg Anhydrous Citric Acid yuav tsum tau ua ntxiv thaum lub sij hawm npaj cov tshuaj txhaj tshuaj kom paub meej tias cov kab mob endotoxins tau txais, nws yog li ntawd sau npe.Qhov twg Anhydrous Citric Acid yog tsis muaj menyuam, nws yog li ntawd sau npe.
• USP Reference Standards 11
USP Citric Acid RS Nyem rau Saib Cov Qauv
Tom ntej: USP Endotoxin RS
Yuav Yuav Li Cas?Thov hu rauDr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com
15 Xyoo Kev Paub?Peb muaj ntau tshaj li 15 xyoo ntawm kev paub nyob rau hauv kev tsim thiab export ntawm ib tug ntau yam ntawm zoo tshuaj intermediates los yog zoo tshuaj.
Kev lag luam loj?Muag rau kev lag luam hauv tsev, North America, Europe, India, Kauslim, Nyiv, Australia, thiab lwm yam.
Qhov zoo?Superior zoo, tus nqi pheej yig, kev pabcuam tshaj lij thiab kev txhawb nqa kev pabcuam, xa khoom sai.
ZooKev lees paub?Kev tswj xyuas nruj nruj.Cov cuab yeej tshaj lij rau kev txheeb xyuas suav nrog NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, KF, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, thiab lwm yam.
Cov qauv?Cov khoom lag luam feem ntau muab cov qauv dawb rau kev soj ntsuam zoo, tus nqi thauj khoom yuav tsum tau them los ntawm cov neeg siv khoom.
Factory Audit?Lub Hoobkas tshawb xyuas txais tos.Thov teem caij ua ntej.
MOQ?Tsis muaj MOQ.Kev txiav txim me me tau txais.
Lub sij hawm xa tuaj? Yog hais tias nyob rau hauv Tshuag, peb hnub shipping guaranteed.
Kev thauj mus los?Los ntawm Express (FedEx, DHL), los ntawm Cua, los ntawm hiav txwv.
Cov ntaub ntawv?Kev pab cuam tom qab muag: COA, MOA, ROS, MSDS, thiab lwm yam tuaj yeem muab tau.
Kev cai Synthesis?tuaj yeem muab cov kev pabcuam sib xyaw ua ke kom haum rau koj cov kev xav tau tshawb fawb.
Cov nqe lus them nqi?Proforma invoice yuav raug xa ua ntej tom qab kev pom zoo ntawm kev txiav txim, kaw peb cov ntaub ntawv hauv tuam txhab nyiaj.Kev Them Nyiaj los ntawm T / T (Telex Transfer), PayPal, Western Union, thiab lwm yam.
Risk Codes
R41 - Riam phom loj rau qhov muag
R36/37/38 - Kab mob rau qhov muag, ua pa thiab tawv nqaij.
R36/38 - Kab mob rau qhov muag thiab tawv nqaij.
R37/38 - Kab mob ua pa thiab tawv nqaij.
R34 - Ua rau kub hnyiab
R36 - Khau qhov muag
R35 - Ua rau kub hnyiab heev
R61 - Tej zaum yuav ua rau muaj mob rau tus menyuam hauv plab
R60 - Tej zaum yuav cuam tshuam fertility
Kev nyab xeeb piav qhia
S26 - Nyob rau hauv rooj plaub ntawm qhov muag, yaug tam sim ntawd nrog dej txaus thiab nrhiav kev kho mob.
S39 - Hnav qhov muag / ntsej muag tiv thaiv.
S37/39 - Hnav cov hnab looj tes tsim nyog thiab tiv thaiv qhov muag / ntsej muag
S24/25 - Tsis txhob sib cuag nrog daim tawv nqaij thiab qhov muag.
S36/37/39 - Hnav cov khaub ncaws tiv thaiv, hnab looj tes thiab tiv thaiv qhov muag / ntsej muag.
S45 - Thaum muaj xwm txheej lossis yog tias koj tsis xis nyob, nrhiav kev kho mob tam sim ntawd (qhia daim ntawv lo thaum twg los tau.)
S36 - Hnav khaub ncaws tiv thaiv zoo.
S53 - Tsis txhob raug - tau txais cov lus qhia tshwj xeeb ua ntej siv.
UN IDs UN 1789 8/PG 3
WGK Germany 1
RTECS GE7350000
FLUKA BRAND F CODE 9
TSCA Yes
HS Code 2918140000
Toxicity LD50 hauv nas, nas (mmol/kg): 5.0, 4.6 ip (Gruber, Halbeisen)
Citric Acid yog cov organic acid tsis muaj zog nrog cov mis C6H8O7.Nws yog ntuj preservative / conservative thiab kuj yog siv los ntxiv acidic, los yog qaub, saj rau cov zaub mov thiab dej qab zib.Nyob rau hauv biochemistry, lub hauv paus conjugate ntawm citric acid, citrate, yog ib qho tseem ceeb raws li ib tug nruab nrab ntawm lub citric acid voj voog, uas tshwm sim nyob rau hauv lub metabolism ntawm tag nrho cov kab mob aerobic.Citric acid yog cov khoom siv tshuaj, nws yog siv los ua cov kua qaub, ua ib qho tsw, thiab ua tus neeg sawv cev chelate.
Citric Acid yog ib tug zoo buffering tus neeg saib xyuas rau kev daws teeb meem ntawm pH 2 thiab pH 8. Nws yog nrov nyob rau hauv ntau buffers nyob rau hauv ntau cov tswv yim, electrophoresis (SSC Buffer #), kom tsis txhob muaj kev cuam tshuam, rau biopurifications, crystallography... Nyob rau hauv biological systems nyob ib ncig ntawm pH 7, ob hom tam sim no yog citrate ion thiab mono-hydrogen citrate ion.pH ntawm 1 mM daws ntawm citric acid yuav yog 3.2.
Citric Acid yog ib qho tseem ceeb ntawm cov organic acid, feem ntau muaj cov molecule ntawm cov dej siv lead ua, tsis muaj ntxhiab, nrog lub zog qaub saj, yooj yim soluble hauv dej.Nws muaj ntau yam siv hauv kev lag luam, khoom noj khoom haus, kev lag luam tshuaj pleev ib ce, thiab lwm yam.
Citric Acid feem ntau yog siv los ua acidulant hauv cov zaub mov, thiab tseem siv rau hauv kev npaj cov tshuaj ua kom txias, cov tshuaj detergent additives siv los ua cov tshuaj reagents, Chromatographic Reagents thiab biochemical reagents, kuj siv rau hauv kev npaj tsis.Nws yog siv nyob rau hauv kev lag luam khoom noj tshwj xeeb raws li ib tug acidifying tus neeg saib xyuas, ib tug PH buffering tus neeg saib xyuas, thiab ua ke nrog rau lwm cov tebchaw raws li ib tug preservation agent.Hauv kev lag luam tshuaj ntxuav tes, nws yog ib qho zoo tagnrho hloov rau phosphate.Boiler tshuaj ntxuav pickling tus neeg saib xyuas, boiler tshuaj ntxuav rinsing tus neeg saib xyuas.Feem ntau yog siv rau cov zaub mov acid, tseem siv rau kev npaj tshuaj txias tus neeg saib xyuas, tshuaj ntxuav tes nrog citric acid yog qhov ua haujlwm tshaj plaws, feem ntau siv cov kua qaub.Siab solubility, muaj zog chelating muaj peev xwm rau hlau ions, tuaj yeem siv rau txhua yam khoom noj, raws li kev tsim khoom tsim nyog siv.Tsis tas li ntawd, cov khoom no kuj siv tau los ua antioxidant Synergist, compound qos starch bleach synergist thiab preservative.Nws yog dav siv los ua acidulant thiab tshuaj ntxiv rau cov khoom noj thiab dej haus.Nws kuj tseem tuaj yeem siv los ua cov tshuaj pleev ib ce, tshuaj ntxuav hlau, mordant, non-toxic plasticizer thiab Boiler Scale Inhibitor ntawm raw cov ntaub ntawv thiab additives.Nws cov khoom siv ntsev tseem ceeb yog sodium citrate, calcium thiab ammonium ntsev, thiab lwm yam, sodium citrate yog ntshav anticoagulant, ferric ammonium citrate tuaj yeem siv los ua cov tshuaj ntshav.siv los ua analytical reagent nrog citric acid.
Siv raws li kev sim tshuaj reagents, chromatographic tsom xam reagents thiab biochemical reagents, kuj siv nyob rau hauv kev npaj ntawm tsis.Nws yog siv nyob rau hauv kev lag luam khoom noj tshwj xeeb raws li ib tug acidifying tus neeg sawv cev, ib tug PH buffering tus neeg saib xyuas, thiab ua ke nrog rau lwm cov tebchaw raws li ib tug preservation agent.Hauv kev lag luam tshuaj ntxuav tes, nws yog ib qho zoo tagnrho hloov rau phosphate.Boiler tshuaj ntxuav pickling tus neeg saib xyuas, boiler tshuaj ntxuav rinsing tus neeg saib xyuas.Nws yog tsuas yog siv los ua tus neeg sawv cev qaub rau cov zaub mov, thiab tseem yog siv rau kev npaj cov tshuaj kho mob coolants thiab detergents.
Nyob rau hauv cov nqe lus ntawm cov khoom noj additives, nws yog tsuas yog siv nyob rau hauv refreshing dej qab zib thiab pickled khoom xws li carbonated dej qab zib, txiv hmab txiv ntoo dej qab zib, thiab lactic acid dej qab zib.Nws qhov kev thov yuav raug hloov pauv ntawm huab cua raws caij nyoog.Citric acid suav txog li 2/3 ntawm tag nrho cov kev siv qaub ncaug.
1. Ntxiv citric acid rau cov txiv hmab txiv ntoo hauv cov kaus poom tuaj yeem tswj tau lossis txhim kho qhov tsw ntawm cov txiv hmab txiv ntoo, nce acidity (txo pH tus nqi) ntawm qee cov txiv hmab txiv ntoo uas tsis muaj acidity thaum khaws cia rau hauv cov kaus poom, ua kom tsis muaj cua sov ntawm cov kab mob thiab inhibit lawv txoj kev loj hlob, thiab tiv thaiv qis acidity.Cov kab mob nthuav dav thiab kev puas tsuaj feem ntau tshwm sim hauv cov kaus poom txiv hmab txiv ntoo.
2. Ntxiv citric acid rau cov khoom qab zib raws li tus neeg sawv cev qaub yog yooj yim rau kev sib haum xeeb nrog cov txiv hmab txiv ntoo saj.Kev siv citric acid hauv gel zaub mov xws li jam thiab jelly tuaj yeem txo qhov tsis zoo ntawm pectin, kom cov hydrogen bonds ntawm pectin molecules tuaj yeem gelled.
3. Thaum ua cov zaub hauv kaus poom, qee cov zaub yog alkaline, thiab siv citric acid los ua pH regulator tsis tau tsuas yog ua lub luag hauj lwm seasoning, tab sis kuj tswj nws zoo.
4. Citric acid muaj cov yam ntxwv ntawm chelation thiab pH hloov kho, kom nws tuaj yeem ua kom muaj kev ua haujlwm ntawm antioxidant, inhibit enzyme kev ua thiab ua kom lub neej ntev ntawm cov zaub mov hauv kev ua cov khoom noj ceev ceev.
Effervescence yog ib qho khoom siv nrov tshaj plaws rau cov khoom xyaw hauv qhov ncauj, citric acid reacts nrog sodium carbonate los yog aqueous sodium bicarbonate los tsim cov CO2 ntau (IE, effervescence) thiab sodium citrate, uas tso cai rau cov khoom xyaw nquag hauv cov tshuaj kom yaj sai sai thiab txhim kho saj. .Piv txwv li, laxatives thiab analgesics muaj cov nyhuv solubilizing.Citric acid phoov yog cov neeg mob ua npaws nrog dej txias, nrog rau tsw, txias, detoxification nyhuv.citric acid yog dav siv nyob rau hauv ntau yam khoom noj khoom haus lub qhov ncauj kua, thiab lwm yam., buffering pH 3.5 ~ 4.5, tswj lub stability ntawm active cov khoom xyaw, ntxiv dag zog rau cov nyhuv ntawm preservatives.Kev sib xyaw ntawm citric acid thiab txiv hmab txiv ntoo tsw ua rau tib neeg nyiam tsw los npog cov tshuaj tsw qab, tshwj xeeb tshaj yog cov tshuaj suav tshuaj.Ntxiv 0.02% citric acid hauv cov khoom xyaw ua kua tuaj yeem tsim cov kab hlau thiab tooj liab, ncua kev degradation ntawm cov khoom xyaw nquag.Kev siv 0.1% ~ 0.2% citric acid hauv cov ntsiav tshuaj zom tuaj yeem txhim kho qhov tsw ntawm cov ntsiav tshuaj thiab ua rau nws muaj cov txiv qaub tsw.
Citric Acid muaj astringent thiab anti-oxidant zog.Nws kuj tseem siv tau los ua cov khoom ruaj khov, pH adjuster, thiab preservative nrog lub peev xwm tsis tshua muaj zog.Nws tsis yog feem ntau khaus rau ntawm daim tawv nqaij, tab sis nws tuaj yeem ua rau kub hnyiab thiab liab thaum siv rau chapped, tawg, lossis lwm yam tawv nqaij.Nws yog muab los ntawm citrus txiv hmab txiv ntoo.
Citric Acid reacts nrog oxidizing tus neeg saib xyuas, hauv paus, txo cov neeg ua haujlwm thiab cov hlau nitrates.Cov tshuaj tiv thaiv nrog hlau nitrates muaj feem cuam tshuam.Cua sov mus rau lub ntsiab lus ntawm decomposition ua rau emission ntawm acrid pa taws thiab pa taws [Lewis].
Tshuaj lom los ntawm txoj hlab ntsha.Muaj tshuaj lom los ntawm subcutaneous thiab intraperitoneal txoj kev.Mob me ntsis toxic byingestion.Qhov muag loj thiab nruab nrab ntawm daim tawv nqaij irritant.Organic acid, ib co allergenic zog.Combustible kua.Muaj peev xwm tawg cov tshuaj tiv thaiv nrog hlau nitrates.Thaum rhuab mus rau decomposition nws emits pa taws thiab fumes.
