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L-CYSTINE

Product Details:

Colour	White
Purity	99.9%
CAS No.	56-89-3
Place of Origin	Sichuan, China (Mainland)
Brand Name	Brightol
Model Number	99.9%

Payment & Shipping Terms:

Minimum Order Quantity:	1 Kilogram As per customers' requirements.
Packaging Details:	25kg/drum
Delivery Time:	Prompt
Payment Terms:	L/C,T/T,Western Union
Supply Ability:	20 Metric Ton per Month As per customers' requirements.

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Detailed Product Description

Product:L-CYSTINE

Chemical Name: L(-)-3,3'-Dithiobis(2-aminopropanoic acid)
Structure Formula:

Molecular Formula: C₆H₁₂N₂O₄S₂Molecular Weight: 240.29
Cas No: [56-89-3]
Characteristics: White crystals or crystalline powder; tasteless. Practically insoluble in water, in ethanol and in ether. Dissolves in dilute HCl.
Quality Standards: AJI92, FCCIV, In-house (ref USP24)

Item	Specifications (AJI92 )	USP 24	FCC IV
Appearance	White crystal or crystalline powder; tasteless
Description	White crystals or crystalline powder
Identification	Infrared absorption spectrum
Specific rotation [a]_D^20°	-215 °- -225 °	-215 ° - -225 °	-215 ° - -225 °
State of solution (Transmittance)	≥ 98.0%	---	---
Chloride(CL)	≤ 0.020%	≤ 0.020%	---
Ammonium(NH₄)	≤ 0.02%	---	---
Sulfate(SO₄)	≤ 0.020%	≤ 0.020%	---
Iron(Fe)	≤ 20PPm	≤ 20PPm	---
Heavy metals(Pb)	≤ 10PPm	≤ 10PPm	20ppm
Arsenic(As₂O₃)	≤ 1PPm	---	---
Other amino acids	Conforms	---	---
Loss on drying	≤ 0.20%	≤ 0.20%	≤ 0.20%
Residue on ignition (Sulfated)	≤ 0.10%	≤ 0.10%	≤ 0.10%
Assay	98.5-101.0%	98.5-101.0%	98.5-101.0%
PH	5.0-6.5	5.0-6.5	---
Organic Volatile impurities	---	Meets the requirements	---

Packaging and Storage: In 25kgs f iber drum double polyethylene bags inside; Preserve in well-closed containers, at controlled room temperature.
R ecommended limit: 1 year.

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