Taurine CAS 107-35-7 Assay 99.0 ~ 101.0% Hoobkas Zoo

Taurine (CAS: 107-35-7) JP Test Method
Taurine, thaum qhuav, muaj tsis tsawg dua 99.0% thiab tsis ntau tshaj 101.0% ntawm C2H7NO3S.
Cov lus piav qhia Taurine tshwm sim raws li cov xim tsis muaj xim lossis dawb, lossis cov hmoov dawb crystalline.
Nws yog soluble hauv dej, thiab xyaum insoluble hauv ethanol (99.5).
Cov pH ntawm cov tshuaj npaj los ntawm dissolving 1.0 g ntawm Taurine nyob rau hauv 20 mL ntawm freshly boiled thiab txias dej yog nruab nrab ntawm 4.1 thiab 5.6.
Kev txheeb xyuas Kev txiav txim siab qhov infrared absorption spectrum ntawm Taurine raws li qhia nyob rau hauv cov poov tshuaj bromide disk txoj kev nyob rau hauv Infrared Spectrophotometry <2.25>, thiab muab piv cov spectrum nrog cov Reference Spectrum: ob qho tib si spectra qhia zoo sib xws ntawm kev nqus ntawm tib yoj tus lej.
Purity (1) Clarity thiab xim ntawm kev daws - Ib qho kev daws tau los ntawm dissolving 1.0 g ntawm Taurine hauv 20 mL dej yog ntshiab thiab tsis muaj xim.
(2) Chloride <1.03>- Ua qhov kev sim nrog 1.0 g ntawm Taurine.Npaj cov tshuaj tswj nrog 0.30 mL ntawm 0.01mol / L hydrochloric acid VS (tsis ntau tshaj 0.011%).
(3) Sulfate <1.14>- Ua qhov kev sim nrog 2.0 g ntawm Taurine.Npaj cov tshuaj tswj nrog 0.40 mL ntawm 0.005 mol / L sulfuric acid VS (tsis ntau tshaj 0.010%).
(4) Ammonium <1.02>-Ua qhov ntsuas nrog 0.25 g ntawm Taurine.Npaj cov tshuaj tswj nrog 5.0 mL ntawm Standard Ammonium Solution (tsis ntau tshaj 0.02%).
(5) Cov hlau hnyav <1.07>-Tau nrog 2.0 g ntawm Taurine raws li Txoj Kev 1, thiab ua qhov kev sim.Npaj cov tshuaj tswj nrog 2.0 mL ntawm Standard Lead Solution (tsis ntau tshaj 10 ppm).
(6) Hlau <1.10>-Npaj cov tshuaj ntsuam xyuas nrog 2.0 g ntawm Taurine raws li Txoj Kev 1, thiab ua qhov kev sim raws li Txoj Kev A. Npaj cov tshuaj tswj nrog 2.0 mL ntawm Standard Iron Solution (tsis ntau tshaj 10 ppm).
(7) Lwm yam tshuaj - Dissolve 1.0 g ntawm Taurine nyob rau hauv 50 mL dej, thiab siv cov tshuaj no raws li cov qauv tov.Pipet 1 mL ntawm cov qauv tov, thiab ntxiv dej kom raws nraim 50 mL.Pipet 1 mL ntawm cov tshuaj no, ntxiv dej kom raws nraim 10 mL, thiab siv cov tshuaj no raws li cov qauv kev daws teeb meem.Ua qhov kev sim nrog cov kev daws teeb meem no raws li qhia hauv Thin-txheej Chromatography <2.03>.Spot 5mL txhua yam ntawm cov qauv kev daws teeb meem thiab cov qauv kev daws teeb meem ntawm lub phaj ntawm silica gel rau nyias txheej chromatography.Tsim lub phaj nrog cov dej sib tov, ethanol (99.5), 1-butanol thiab acetic acid (100) (150: 150: 100: 1) mus rau qhov deb li ntawm 10 cm, thiab cua qhuav lub phaj.Txau tusyees ninhydrin-butanol TS ntawm lub phaj, thiab kub ntawm 105 ℃ rau 5 feeb: qhov chaw uas tsis yog lub hauv paus ntsiab lus nrog cov qauv tshuaj tsis ntau tshaj ib qho chaw, thiab nws tsis yog khaus ntau tshaj qhov chaw nrog cov txheej txheem tov. .
Poob ntawm ziab <2.41> Tsis pub ntau tshaj 0.20% (1 g, 105 ℃, 2 teev).
Residue ntawm ignition <2.44>Tsis ntau tshaj 0.1% (1 g).
Assay Weigh kom raug txog 0.2 g ntawm Taurine, yav tas los qhuav, yaj hauv 50 mL dej, ntxiv 5 mL ntawm formaldehyde tov, thiab titrate <2.50> nrog 0.1 mol / L sodium hydroxide VS (potentiometric titration).Ua ib qho kev txiav txim siab dawb paug ib yam nkaus, thiab ua kom muaj kev kho qhov tsim nyog.
Txhua mL ntawm 0.1 mol / L sodium hydroxide VS ＝12.52 mg ntawm C2H7NO3S
Containers thiab storageContainers-Zoo-kaw ntim.

Taurine (CAS: 107-35-7) USP Test Method
DEFINITION
Taurine muaj NLT 98.5% thiab NMT 101.5% ntawm taurine (C2H7NO3S), suav ntawm lub hauv paus qhuav.
IDENTIFICATION
• A. INFRARED ABSORPTION <197K>
QHIA
• NITROGEN DETERMINATION, Txoj Kev II <461>
Analysis: Ua raws li qhia hauv tshooj.Txhua mL ntawm 0.01 N sulfuric acid yog sib npaug rau 1.25 mg ntawm C2H7NO3S.
Kev lees txais: 98.5% -101.5% ntawm lub hauv paus qhuav
IMPURITIES
• RESIDUE ON IGNITION <281>: NMT 0.3%
• chloride thiab sulfate, chloride <221>
Txheem: 0.50 mL ntawm 0.020 N hydrochloric acid
Qauv: 0.7 g ntawm Taurine
Kev lees txais: NMT 0.05%
• chloride thiab sulfate, sulfate <221>
Txheem: 0.25 mL ntawm 0.020 N sulfuric acid
Qauv: 0.8 g ntawm Taurine
Kev lees txais: NMT 0.03%
• IRON <241>: NMT 30 ppm
• HEAVY METALS, Txoj Kev I <231>: NMT 15 ppm
• Muaj feem cuam tshuam
Kev daws teeb meem: 0.05 mg / mL ntawm USP Taurine RS hauv dej ib qho sib npaug ntawm li 0.5% ntawm cov qauv tshuaj
Piv txwv li: 10 mg / mL ntawm Taurine hauv dej
Chromatographic system
(Saib Chromatography <621>, Thin-Layer Chromatography.)
Mode: TLC
Adsorbent: 0.25-mm txheej ntawm chromatographic silica gel sib tov
Daim ntawv thov ntim: 5 µL
Tsim cov kuab tshuaj: Butyl cawv, glacial acetic acid, thiab dej (3: 1: 1)
Txau reagent: 2 mg / mL ntawm ninhydrin hauv kev sib xyaw ntawm butyl cawv thiab 2 N acetic acid (95: 5)
Kev Ntsuas: Qhuav lub phaj ntawm 80 ° rau 30 min.Txau lub phaj nrog Spray reagent, thiab kub ntawm 80 ° rau li 10 min.Tshawb xyuas lub phaj hauv qab lub teeb dawb.[CEEB TOOM-Tus nqi RF rau cov pob taurine yuav tsum yog li 0.2.]
Kev lees txais cov qauv: Tsis muaj qhov chaw thib ob ntawm cov qauv kev daws teeb meem loj dua lossis hnyav dua li qhov chaw tseem ceeb ntawm Cov Txheej Txheem.
Tus kheej impurities: NMT 0.5%
TSEEM CEEB
• LOSS RAU DRYING <731>: Qhuav ib qho qauv ntawm 105 ° rau 3 h: nws poob NMT 0.3% ntawm nws qhov hnyav.
TSEEM CEEB
• PACKAGING THIAB STORAGE: Khaws rau hauv cov thawv kaw kom zoo.
• USP REFERENCE STANDARDS <11>
USP Taurine RS