L-Cysteine monohydrochloride（CAS# 52-89-1)

Chemical Property:

Molecular Formula	C3H8ClNO2S
Molar Mass	157.62
Melting Point	180°C
Boling Point	305.8°C at 760 mmHg
Specific Rotation(α)	5.5 º (c=8, 6 N HCL)
Flash Point	138.7°C
Water Solubility	SOLUBLE
Solubility	H2O: 1M at20°C, clear, colorless
Vapor Presure	0.000183mmHg at 25°C
Appearance	White Crystals
Color	White to light brown
Merck	14,2781
BRN	3560277
Storage Condition	Inert atmosphere,Room Temperature
Stability	Stable, but light, moisture and air sensitive. Incompatible with strong oxidizing agents, some metals.
Sensitive	Hygroscopic
MDL	MFCD00064553
Physical and Chemical Properties	White Crystal or crystalline powder, odor, acid, soluble in water, ammonia, acetic acid, ethanol-soluble, acetone, ethyl acetate, benzene, carbon disulfide, carbon tetrachloride. Acid stability, and in neutral or slightly alkaline solution is easy to be air oxidation into cystine, trace iron and heavy metal ions can promote oxidation. Its hydrochloride is more stable, so it is generally made into hydrochloride. L-cysteine is a sulfur-containing non-essential amino acid. In the living body, the hydroxyl oxygen atom of serine is replaced by the sulfur atom of methionine and synthesized via the thioether. L-cysteine can generate glutathione, involved in the reduction process of cells and phospholipid metabolism in the liver, can protect liver cells from damage, and can stimulate hematopoietic function, increase white blood cells, promotes the repair of skin lesions. Its mp is 175 ℃, decomposition temperature is 175 ℃, isoelectric point is 5.07, [α]25D-16.5 (H2O), [α]25D 6.5 (5mol/L, HCl).
Use	Widely used in cosmetics, medicine, food and other industries

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Product Detail

Product Tags

Hazard Symbols	Xi – Irritant
Risk Codes	36/37/38 – Irritating to eyes, respiratory system and skin.
Safety Description	S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 – Wear suitable protective clothing.
WGK Germany	2
RTECS	HA2275000
FLUKA BRAND F CODES	3-10-23
TSCA	Yes
HS Code	29309013
Toxicity	LD50 intraperitoneal in mouse: 1250mg/kg

Introduction

Strong acid taste, odorless, only trace sulfite smell. It is an amino acid used by various tissue cells to defend against harmful substances and increase vitality in animals and plants. It is also one of more than 20 amino acids that make up proteins, and it is the only amino acid with active sulfhydryl (-SH).

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