L-Cysteine ​​Hydrochloride Monohydrate CAS 7048-04-6 Assay 98.5~101.0% (Titration on Dried Basis) Factory

L-Cysteine ​​Hydrochloride Monohydrate (CAS: 7048-04-6) AJI97 Hana Hana
ʻIke: E hoʻohālikelike i ka spectrum absorption infrared o ka hāpana me ke ʻano maʻamau ma ke ʻano pāpaʻi pāpaʻi bromide.
Ka Po'ai Pono [α]D20: La'ana malo'o, C=8, 1mol/L HCl
Moku'āina o ka Solution (Transmittance): 1.0g i 10ml o H2O, spectrophotometer, 430nm, 10mm ka mānoanoa pūnaewele.
Klorida (Cl): 350mg, B-2
Ammonium (NH4): A-1
Sulfate (SO4): 1.2g, (1), ref: 0.50ml o 0.005mol/L H2SO4
Hao (Fe): 1.5g, ref: 1.5ml o Iron Std.(0.01mg/ml)
Nā Metala Kaumaha (Pb): 2.0g, (1), pH=7, ref: 2.0ml o Pb Std.(0.01mg/ml)
Arsenic (As2O3): 2.0g, (1), ref: 2.0ml o As2O3 Std.
Nā'Amino'ē aʻe: Ho'āʻo Laʻana: 50μg, B-6-a, mana;L-Cys·HCl·H2O 0.25μg
Pohō ma ka hoʻomaloʻo ʻana: I loko o ka momi, P2O5, ma ka lumi wela no 20 mau hola.
Ke koena ma ka ʻāʻā (Sulfated): AJI Test 13
Ho'āʻo: Lapana maloʻo, 250mg, 0.05mol/L I2 1ml=15.762mg C3H7NO2S·HCl
Ho'āʻo pH: 1.0g i 100ml o H2O

L-Cysteine ​​​​Hydrochloride Monohydrate (CAS: 7048-04-6) USP35 Hana Hana
HOAKAKA
ʻO Cysteine ​​Hydrochloride ka L-Cysteine ​​Hydrochloride Monohydrate a loaʻa iā NLT 98.5% a me NMT 101.5% o L-Cysteine ​​Hydrochloride (C3H7NO2S·HCl), i helu ʻia ma ke kumu maloʻo.
IKE
A. KA PALAPALA INFRARED <197K>
HANA
HANA
Laʻana: 250 mg o Cysteine ​​Hydrochloride
Blank: E hoʻomau e like me ke kuhikuhi ʻana i ka ʻIkepili me ka ʻole o ka Laʻana.
Pūnaehana Titrimetric
(E nānā i ka Titrimetry <541>)
Ke ano: Koe titration
Titrant: 0.1 N iodine VS
Hoʻopaneʻe hope: 0.1 N sodium thiosulfate VS
ʻIke hope: ʻike
Nānā: E hoʻololi i ka Laʻana i loko o ka ipu iodine.E hoʻohui i 20.0 mL o ka wai a me 4 g o ka potassium iodide, a hui pū.E hooluolu i ka wai hooluu iloko o ka wai hau, a e hookomo i 5 mL o 3 N waikona hydrochloric a me 25.0 mL o 0.1 N iodine VS.E hoʻokomo i ka pahu, a e kū i ka pōʻeleʻele no 20 min.E hoʻokahe i ka iodine keu me ka titrant Back.E hoʻohui i 3 mL o ka hōkū ch TS ke hoʻokokoke ʻia ka hopena.Ma ke ʻano o ka hoʻoholo Blank.E helu i ka pākēneka o ka cysteine ​​​​hydrochloride (C3H7NO2S·HCl) ma ka laʻana i lawe ʻia:
Ka hopena = {[(VB − VS) × N × F]/W} × 100
VB = Ka nui titrant hope i hoʻopau ʻia e ka Blank (mL)
VS = Ka nui titrant hope i hoʻopau ʻia e ka Laʻana (mL)
N = maʻamau maoli o ka titrant Back (mEq/mL)
F= helu kaulike, 157.6 mg/mEq
W= Kaumaha laʻana (mg)
Nā pae hoʻoholo: 98.5% ~ 101.5% ma ke kumu maloʻo
NA mea haumia
KOE MA KA HANA <281>: NMT 0.4%
KLORIDA A ME KA SULFATE, Sulfate <221>
Haʻina maʻamau: 0.10 mL o 0.020 N sulfuric acid
Laʻana: 0.33 g o Cysteine ​​Hydrochloride
Nā pae ʻae ʻae: NMT 0.03%
HAAWINA <241>: NMT 30ppm
NA METAL KAUHA, Keʻano I <231>: NMT 15ppm
NA PUNA PILI
N-Ethylmaleimide solution: 40 mg/mL o N-ethylmaleimide i loko o ka waiʻona
Haʻina waiwai maʻamau: E hoʻoheheʻe i 20 mg o USP L-Cysteine ​​Hydrochloride RS i 10.0 mL wai.E hoʻohui i 10.0 mL o ka solution N-Ethylmaleimide, a hui pū.E ʻae i ka hopena e kū no 5 min ma mua o ka hoʻohana ʻana.
ʻO ka hoʻonā maʻamau: 0.05 mg/mL mai ka hoʻonā waiwai maʻamau i ka wai.[ MAKEMAKE-He koʻikoʻi ko kēia haʻina e like me ka 0.5% o ko ka Haʻina Haʻawina.]
ʻO ka hoʻonā kūpono o ka ʻōnaehana: E hoʻololi i 10 mg o USP L-Tyrosine RS a me 10 mL o ka solution stock maʻamau i kahi pahu volumetric 25-mL.E hoʻoheheʻe me ka wai i ka nui.
Laʻana hoʻoheheʻe waihona: E hoʻololi i ka 0.2 g o ka Cysteine ​​​​Hydrochloride i loko o kahi pahu volumetric 10-mL, hoʻoheheʻe, a hoʻoheheʻe ʻia me ka wai i ka nui.
Haʻawina Laʻana: I ka 5.0 mL o ka Sample stock solution e hoʻohui i 5.0 mL o N-Ethylmaleimide solution, a hui.E ʻae i ka hopena e kū no 5 min ma mua o ka hoʻohana ʻana.
Pūnaehana Chromatographic (E nānā i ka Chromatography <621>, Thin-Layer Chromatography.)
Ke ano: TLC
Adsorbent: 0.25-mm papa o ka huila silica gel chromatographic
Nui noi: 5μL
Ke kūkulu nei i ka ʻōnaehana solvent: Butyl alcohol, glacial acetic acid, a me ka wai (3:1:1)
Pahu mea hoʻoponopono: 2 mg/mL o ninhydrin i loko o ka hui ʻana o ka butyl alcohol a me 2N acetic acid (95:5)
Kūpono ʻōnaehana
Nā koi kūpono: Hōʻike ka chromatogram o ka ʻōnaehana kūpono i nā wahi ʻelua i hoʻokaʻawale ʻia.
Kānāwai
Nā Laʻana: Haʻina maʻamau, Haʻina kūpono kūpono, a me ka hāʻina Laʻana.
Ma hope o ka hoʻomaloʻo ʻana i ka ea, e kāpī me ka Spray reagent, a wela ma waena o 100 ° a me 105 ° no 15 min.E nānā i ka pā ma lalo o ke kukui keʻokeʻo.
Paʻa ʻae ʻia: ʻAʻole ʻoi aku ka nui a ʻoi aku ka ikaika o nā wahi lua o ka solution Sample ma mua o ka wahi nui o ka solution Standard.
Nā haumia o kēlā me kēia kanaka: NMT 0.5%
Huina haumia: NMT 2.0%
NA HOAO KUAI
KA HOʻOLOLI OPTICAL, Hoʻololi kikoʻī <781S>
Laʻana hoʻonā: 80 mg/mL i ka 6 N hydrochloric acid
Nā mea e ʻae ai: +5.7° a i +6.8°
LOSSON DRYING <731>: Hoʻomaloʻo i kahi laʻana ma ka lumi wela ma ke kaomi ʻaʻole ʻoi aku ma mua o 5 mm o ka mer cury no 24 mau hola: lilo ia i 8.0%~12.0% o kona kaumaha.
NA KOI HOU
PACKAGING a me ka mālama ʻana: mālama i loko o nā pahu paʻa maikaʻi.
USP REFERENCE STANDARD <11>
USP L-Cysteine ​​​​Hydrochloride RS
USP L-Tyrosine RS