Shijiazhuang Shixing Amino Acid Co.,Ltd.

L-CYSTINE

[Product Name]: L-CYSTINE
[Other Name]: L-CYSTINE ACID, DICYSTEINE, GELUCYSTINE
[Molecular Formula]: C₆H₁₂N₂O₄S₂
[Structural Formula]: HOOCCH(NH₂)CH₂SSCH₂CH(NH₂)COOH
[Molecular Weight]: 240.30
[CAS]: 56-89-3
[EINECS]: 200-296-3
[E No]: 921
[Description]: white powder, odorless, tasteless, insoluble in water, alcohol, ether, acetone, soluble in HCl or NaOH solution.
[Standard]: Pharma Grade EP8, Food grade FCCV, or according to buyer's requirements.

Item	Pharma Grade (EP8)	Food Grade (FCCV)
Characters	White crystalline powder	White crystalline powder
Assay(on dry basis)	98.5~101.0%	98.5~101.5%
Appearance of solution	Pass test	--
Specific rotation	-218º~-224º	-215º~-225º
Ninhydrin positive substances	Any impurity: 0.2% MAX	--
Chloride	200ppm MAX	--
Sulphate	300ppm MAX	--
Ammonium	200ppm MAX	--
Iron	10ppm MAX	--
Heavy metals	10ppm MAX	--
Lead	--	5mg/kg MAX
Loss on drying	0.5% MAX	0.2% MAX
Sulphated ash	0.1% MAX	0.1% MAX

Usage: Generally used as a nutritional supplement.
Packing: In fiber drum 25KG net each.
Transport and storage: It is harmless material, handle with cares to avoid damaging the package, and protect them from sunshine or rain. Don’t transport it with poisonous or harmful goods. Stored in room temperature.

Previous Next

Add	: JIACUN, XINGAN, GAOCHENG, SHIJIAZHUANG, 052160, CHINA
Tel	: +86-311-85296281	Fax	: +86-311-85296280
E-mail	: gchem@126.com	Url	: www.aminoacid-chem.com