L-Cysteine Hydrochloride anhydrous (CAS 52-89-1) is white crystalline powder, a sulfur-containing essential amino acid hydrochloride. It possesses strong reducing and antioxidant properties, easily soluble in water. It is widely applied in food, pharmaceutical, cosmetic and biochemical research fields. It is prone to oxidation when exposed to air and moisture. TNJ Chemical is the key manufacturer and exporter since from 2001 in China. If you want to buy L-Cysteine HCL anhydrous or monohydrate food or Pharma USP grade at competitive price, please contact sales@tnjchem.com
Product information
Chemical Name L-Cysteine Hydrochloride (Anhydrous)
Common Name L-Cysteine HCl
CAS Number 52-89-1
Molecular Formula C₃H₈ClNO₂S
Molecular Weight 157.62 g/mol
EC Number 200-157-7
Grade Available Food grade, USP / Ph.Eur pharmaceutical grade, Biochemical grade
Hazard Statement May cause irritation to skin and eyes
Chem-physical properties
Appearance White crystalline powderOdor Slight characteristic sour odor
Melting Point 175 °C (decomposition)
Solubility Freely soluble in water; slightly soluble in ethanol; insoluble in ether, benzene and acetonepH (1 % aqueous solution) 1.7‑2.4
Optical Rotation [α]20/D +5.5 ° ~ +7.0 °
Stability Stable under acidic condition; easy to be oxidized by air in neutral or alkaline environment; hygroscopic
Quality specification
| Item | Food Grade | USP / Ph.Eur Grade |
|---|---|---|
| Assay (L‑Cysteine HCl) | ≥98.5 % | 98.5‑101.0 % |
| Optical Rotation [α]20/D | +5.5 ° ~ +7.0 ° | +5.0 ° ~ +8.0 ° |
| Loss on drying | ≤0.5 % | ≤0.5 % |
| Residue on ignition | ≤0.1 % | ≤0.1 % |
| Heavy metals (Pb) | ≤10 ppm | ≤10 ppm |
| Iron (Fe) | ≤10 ppm | ≤10 ppm |
Application & use
Food industry: Dough conditioner for bakery products, antioxidant, browning inhibitor, nutritional supplement.
Pharmaceutical field: Raw material for amino acid preparations, expectorant and detoxification agent.
Cosmetic & personal care: Reducing agent for hair perm and hair-straightening formulations, antioxidant ingredient.
Biochemical research: Reducing reagent, culture medium additive for microorganism cultivation.
Packing
25 kg fiber drum with inner double PE bag.
Lab small pack: 1 kg, 5 kg sealed aluminum foil bag.
Keep package tightly sealed against air and moisture.
Transportation & storage
- Transportation: Non‑dangerous goods. Avoid direct sunlight, rain and moisture. Keep away from oxidizing agents. Prevent package breakage.
- Storage: Store in cool, dry and well-ventilated warehouse. Keep container tightly closed and protected from light.
- Shelf-life: 24 months under proper storage conditions.
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