World Well-Being Biotech CAS 52-90-4 99% L-Cysteine

• Certification: ISO, FDA, Hahal, Food Manufacturing License, Business Licens
• Assay Method: HPLC, UV
• Application Form: Tablet, Capsule
• Application: Health Care Products, Medicine, Food & Beverage, Skin Care, Feed
• State: Powder
• Extract Source: Synthesis
• Model NO.: HWW2023120622
• Product Name: L-Cysteine
• Appearance: White Powder
• Payment: T/T in Advance
• Shelf Life: White Powder
• Delivery Time: 3-5 Working Days
• Free Sample: Available
• Transport Package: 25kg/Drum
• Specification: 99% L-Cysteine
• Origin: Hunan, China
• Production Capacity: 5t/Month

Product Description

Product Description

Description 
L-cysteine is an optically active form of cysteine having L-configuration. It has a role as a flour treatment agent, a human metabolite and an EC 4.3.1.3 (histidine ammonia-lyase) inhibitor. It is a serine family amino acid, a proteinogenic amino acid, a cysteine and a L-alpha-amino acid. It is a conjugate base of a L-cysteinium. It is a conjugate acid of a L-cysteinate(1-). It is an enantiomer of a D-cysteine. It is a tautomer of a L-cysteine zwitterion.
 

Testing Item	Standard	Result
Appearance	White crystals or crystalline powder	conforms
Specific rotation[a]D20	+ 8.3°~ +9.5°	+8.72°
State of solution (Transmittance)	≥95.0%	98.5%
Loss on drying	≤0.50%	0.18%
Residue on ignition	≤0.10%	0.07%
Heavy metals(Pb)	≤10PPM	<10PPM
Chloride (Cl)	600---1000ppm	800ppm
Arsenic (As2O3)	≤1PPM	conforms
Iron (Fe)	≤10PPM	<10PPM
Ammonium (NH4)	≤0.02%	<0.02%
Sulfate (SO4)	≤0.030%	≤0.030%
Other amino acids	Chromatographically	Qualified
PH value	4.5 ~ 5.5	5.0
Assay	98.0%~101.0%	99.4%