L-Cysteine base Cas:52-90-4 (skype:ycsclee123)

L-Cysteine base Cas:52-90-4 (skype:ycsclee123) key words:L-Cysteine base, Cas:52-90-4, pharmaceutical Basic info: product name:L-Cysteine base Cas:52-90-4 Quality Standard: AJI97 Description: white crystals or crystalline powder. Solubility (H2O, g/100g): about 16(20°) Specific rotation: +8.3 to +9.5° State of solution(transmittance): Not less than 95.0% Chloride: Not more than 0.04% Ammonium: Not more than 0.02% Sulfate: Not more than 0.030% Iron: Not more than 10ppm Heavy metals(Pb): Not more than 10ppm Arsenic: Not more than 1ppm Other Amino Acids: conforms Loss on drying: Not more than 0.5% Residue on ignition(sulfated): Not more than 0.10% Assay: 98.0 to 101.0% PH: 4.5 to 5.5 Storage: Preserve in tight containers at controlled room temperature. Recommended limit: 1 year Advantages: 1.Rich experiences. we have specialized in chemical manufacturing for 15 years. 2.high pass rate. special packages are choosen.once problem is found, package will be shipped again for free. 3.Top quality.We have a first-class machine and research team. 4.OEM service is availble.So that you can get the products only designing for yourself. 5.large stock to guarantee products are availble at any time. 6.Warm after-sale service for you 24/7.once problem is found, package will be shipped again for free. 7.Best price.price is changeable according to the quality. contacts:email:[email protected] skype:ycsclee123 whatsapp:133007130937 qq:2355880545