Specification Sheet

Product Name
L-Cystine ≥99.7% (TLC)

Product Number
30200

Product Brand
SIGMA

CAS Number
56-89-3

Molecular Weight
240.30

Test

Specification

APPEARANCE (COLOR)Colorless or White
APPEARANCE (FORM)Powder to Crystals
TITRATION99.0 - 101.0 %
PURITY (TLC AREA %)≥ 99.7 %
SPECIFIC ROTATION (20/D)-219 ± 5 Degrees
CONCENTRATIONC=1 IN HYDROCHLORIC ACID 1M
SOLUBILITY (COLOR)Colorless
SOLUBILITY (TURBIDITY)Clear
SOLUBILITY (METHOD)0.5G IN 10ML 1M HYDROCHLORIC ACID
LOSS ON DRYING≤ 0.1 %
SULFATED ASH≤ 0.1 %
INFRARED SPECTRUMCONFORMS TO STRUCTURE
METAL TRACE ANALYSIS (ICP)CORRESPONDS TO REQUIREMENTS
CALCIUM (ICP)≤ 50 mg/kg
CADMIUM (ICP)≤ 5 mg/kg
COBALT (ICP)≤ 5 mg/kg
CHROMIUM (ICP)≤ 5 mg/kg
COPPER (ICP)≤ 6 mg/kg
IRON (ICP)≤ 10 mg/kg
POTASSIUM (ICP)≤ 50 mg/kg
MAGNESIUM (ICP)≤ 5 mg/kg
MANGANESE (ICP)≤ 5 mg/kg
SODIUM (ICP)≤ 150 mg/kg
NICKEL (ICP)≤ 5 mg/kg
LEAD (ICP)≤ 5 mg/kg
ZINC (ICP)≤ 5 mg/kg
CHLORIDE (CL)≤ 500 mg/kg
SULFATE (SO4)≤ 100 mg/kg

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