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

L-Cysteine ​​Hydrochloride Monohydrate (CAS: 7048-04-6) AJI97 Tikanga Whakamatau
Tautuhinga: Whakatauritea te awhiowhiotanga infrared absorption o te tauira ki tera o te paerewa ma te tikanga kōpae pāhare pāporo bromide.
Hurihuri Tau [α]D20: Tauira maroke, C=8, 1mol/L HCl
State of Solution (Transmittance): 1.0g i te 10ml o H2O, spectrophotometer, 430nm, 10mm te matotoru pūtau.
Chloride (Cl): 350mg, B-2
Haukinia (NH4): A-1
Putakawa (SO4): 1.2g, (1), ref: 0.50ml o 0.005mol/L H2SO4
Rino (Fe): 1.5g, ref: 1.5ml o Iron Std.(0.01mg/ml)
Nga Kourarahi Taumaha (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.
Ētahi atu Acid Amino: Tauira Whakamātautau: 50μg, B-6-a, mana whakahaere;L-Cys·HCl·H2O 0.25μg
Ngaronga i te whakamaroke: I roto i te korehau, P2O5, i te pāmahana rūma mo te 20 haora.
Te toenga i runga i te mura (Sulfated): AJI Test 13
Te whakamatautau: Tauira maroke, 250mg, 0.05mol/L I2 1ml=15.762mg C3H7NO2S·HCl
Whakamātautau pH: 1.0g i te 100ml o H2O

L-Cysteine ​​Hydrochloride Monohydrate (CAS: 7048-04-6) USP35 Tikanga Whakamatau
WHAKAMAHI
Ko te Cysteine ​​Hydrochloride he L-Cysteine ​​Hydrochloride Monohydrate me te NLT 98.5% me te NMT 101.5% o te L-Cysteine ​​Hydrochloride (C3H7NO2S · HCl), kua tatauhia i runga i te whakamaroke.
WHAKATAUTANGA
A. KAUPAPA INFRARED <197K>
WHAKAMAHI
WHAKAMAHI
Tauira: 250 mg o Cysteine ​​Hydrochloride
Putea: Haere tonu i roto i te Tatari me te kore te Tauira.
Pūnaha Titrimetric
(Tirohia Titrimetry <541>)
Aratau: Te titration toenga
Titrant: 0.1 N iodine VS
Te titrant o muri: 0.1 N konutai tiosulfate VS
Te kitenga ira mutunga: Ataata
Tātaritanga: Whakawhitihia te Tauira ki te ipu iodine.Tāpirihia te 20.0 mL wai me te 4 g pāhare pāporo iodide, ka uru.Whakamaohia te wairewa i roto i te pati hukapapa, ka tapirihia te 5 mL o te waikawa puota 3 N me te 25.0 mL o te 0.1 N iodine VS.Whakauruhia te kati, ka waiho kia tu i roto i te pouri mo te 20 min.Whakawetohia te taikaha o te iodine ki te Titita Whakamuri.Tāpirihia te 3 mL o te whetū ch TS i te wa e tata ana te pito mutunga.Ma te ahua o te whakatau Patea.Tātaihia te ōrau o te cysteine ​​hydrochloride (C3H7NO2S·HCl) i roto i te Tauira i tangohia:
Hua = {[(VB − VS) × N × F]/W} × 100
VB = Rōrahi titrant whakamuri i pau i te Patea (mL)
VS = rōrahi titrant whakamuri i pau i te Tauira (mL)
N = te tikanga tuturu o te Titita Whakamuri (mEq/mL)
F= tauwehe taurite, 157.6 mg/mEq
W= Tauira taumaha (mg)
Paearu whakaae: 98.5% ~ 101.5% i runga i te whakamaroke
NGA POKE
TOHUTOHU I RUNGA I TE MAHI <281>: NMT 0.4%
CHLORIDE AND SULFATE, Sulfate <221>
Wairewa paerewa: 0.10 mL o te 0.020 N te waikawa pungatara
Tauira: 0.33 g o Cysteine ​​Hydrochloride
Paearu whakaae: NMT 0.03%
RINO <241>: NMT 30ppm
NGA METAL TAITAHA, Tikanga I <231>: NMT 15ppm
NGA KAUPAPA KAUPAPA
Wairewa N-Ethylmaleimide: 40 mg/mL o N-ethylmaleimide i roto i te waipiro
Te otinga kararehe paerewa: Whakarewahia te 20 mg o USP L-Cysteine ​​Hydrochloride RS ki te 10.0 mL wai.Tāpirihia he 10.0 mL o te otinga N-Ethylmaleimide, ka uru.Tukua te otinga kia tu mo te 5 meneti i mua i te whakamahi.
Wairewa Paerewa: 0.05 mg/mL mai i te wairewa rakau Paerewa i roto i te wai.[ FAKATOKANGA-He kukū tenei otinga ki te 0.5% o te otinga Tauira.]
Te otinga pai o te punaha: Whakawhitihia te 10 mg o te USP L-Tyrosine RS me te 10 mL o te otinga kararehe Paerewa ki te ipu 25-mL.Waimeha ki te wai ki te rōrahi.
Tauira otinga kararehe: Whakawhitihia te 0.2 g o te Cysteine ​​Hydrochloride ki te pounamu 10-mL, ka memeha, ka waimeha ki te wai ki te rōrahi.
Tauira otinga: Ki te 5.0 mL o te Tauira wairewa kararehe taapirihia te 5.0 mL o te otinga N-Ethylmaleimide, ka uru.Tukua te otinga kia tu mo te 5 meneti i mua i te whakamahi.
Pūnaha Chromatographic (Tirohia Chromatography <621>, Chromatography Apa Angiangi.)
Aratau: TLC
Adsorbent: 0.25-mm te paparanga o te ranunga chromatographic silica gel
Rōrahi tono: 5μL
Te whakawhanake i te punaha whakarewa: Te waipiro Butyl, te waikawa acetic glacial, me te wai (3:1:1)
Reagent reagent: 2 mg/mL o te ninhydrin i roto i te ranunga o te waipiro butyl me te waikawa 2N acetic (95:5)
Te pai o te punaha
Nga whakaritenga e tika ana: E whakaatu ana te chromatogram o te otinga pai o te punaha e rua nga waahi kua wehea.
Tātaritanga
Tauira: Te otinga Paerewa, Te otinga pai o te punaha, me te otinga Tauira.
I muri i te whakamaroke-rangi i te pereti, rehu ki te Reagent Reagent, ka whakamahana i waenga i te 100° me te 105° mo te 15 min.Tirohia te pereti i raro i te marama ma.
Paearu whakaae: Ko nga waahi tuarua o te otinga Tauira kaore i te nui ake, i te kaha ake ranei i te waahi matua o te otinga Paerewa.
He poke takitahi: NMT 0.5%
Tapeke poke: NMT 2.0%
NGA WHAKAMATAUTANGA
TE WHAKATAUTANGA OPTICAL, Te Hurihanga Motuhake <781S>
Tauira otinga: 80 mg/mL i roto i te 6 N waikawa pūhaumāota
Paearu whakaae: +5.7° ki +6.8°
TE WHAKAMAROKE NGARO <731>: Me whakamaroke tetahi tauira ki te pāmahana rūma i te pehanga kaua e neke ake i te 5 mm o te mer cury mo te 24 haora: ka ngaro te 8.0%~12.0% o tona taumaha.
HE WHAKAMAHI ATU
PAKITANGA ME TE WHAKAPUTANGA: Tiakina ki roto i nga ipu kua kati pai.
USP REFERENCE STANDARD <11>
USP L-Cysteine ​​Hydrochloride RS
USP L-Tyrosine RS