L-Cystéine 98.5-101.0% (alcalimétrie, calculée sur la substance anhydre), EMPROVE® ESSENTIAL Ph. Eur., USP suitable for use as excipient, SAFC®
Supplier: MERCK PRODUCTION CHEMICALS
Certificates
About this item
Synonyms: (R)-(+)-Cysteine hydrochloride monohydrate, (R)-2-Amino-3-mercaptopropanoic acid hydrochloride hydrate, L-Cysteine HCI Monohydrate, H-Cys-OH.HCl.H2O, Cysteine Hydrochloride, Monohydrate, Cysteine Hydrochloride monohydrate
CAS Number:7048-04-6
:
Formula:HSCH₂CH(NH₂)COOH·HCl·H₂O
MDL Number:MFCD00065606
Density:1.54 g/cm³
Molecular Weight:175.64 g/mol
Melting Pt:168…170 °C
Merck Index:13,02810
EINECS:200-157-7
:GHS07
Storage Temperature:Température ambiante
Specifications
- Environmentally Preferable:
Specifications
Specification Test Results
- Assay (Iodometric, calc. on Dried Substance):98.5-101.0%
- Ammonium (NH4):Max. 0.02%
- Appearance:White Crystalline Powder or Colorless Crystals
- Appearance of Solution (25 g/l, water):Clear and no more Intense in Color than BY6
- Heavy metals (as Pb):Max 0.001%
- Identity (IR-spectrum):Passes test
- Iron (Fe):Max. 0.002%
- Loss on Drying (Vacuum):Max. 12.0%
- Ninhydrin-Positive Substances (TLC):Max. 0.5%
- Organic Volatile Impurities (According to USP):Conforms
- Residual Solvents (Ph.Eur./ICH):Excluded by Manufacturing Process
- Specific Rotation [a]20/D; 80 g/l; HCl 250 g/l, Dried:+5.5 - +7.0°
- Specific rotation [a]25/D; 80g/l; HCl 6mol/l, Dried:+5.7 - +6.8°
- Sulfate (SO4):Max. 0.03%
- Sulfated ash (600 °C):Max. 0.1%
Specification Test Results
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