

| 化學(xué)名稱(chēng): | L-半胱氨酸 | 
| INCI名稱(chēng): | 半胱氨酸 | 
| 英文名稱(chēng): | CYSTEINE | 
| CAS號: | 52-90-4 | 
| HS編碼 | 2930901000 | 
| 化學(xué)式: | C3H7NO2S | 
| 分子量: | 121.16 | 
| 中文別名: | L-半胱氨酸; L-2-氨基-3-巰基丙酸; 半胱氨酸; (R)-2-氨基-3-巰基丙酸 | 
| 英文別名: | L-Cysteine; Cysteine, L- (8CI); (R)-2-Amino-3-mercaptopropanoic acid; (R)-Cysteine; 1: PN: WO2016124781 SEQID: 1 claimed protein; 2-Amino-3-mercaptopropionic acid; 2: PN: US20130315955 SEQID: 1 claimed DNA; 391: PN: WO2010118878 PAGE: 60 claimed sequence; 5: PN: WO2011003622 SEQID: 5 claimed sequence; Cystein; Cysteine; E 920; Half-cystine; L-(+)-Cysteine; L-Alanine, 3-mercapto-; L-Cys; NSC 8746; Propanoic acid, 2-amino-3-mercapto-, (R)-; Thioserine; β-Mercaptoalanine | 
| 指 標 Specification | 標 準 Standard | 
| 外觀(guān) Appearance | 白色或類(lèi)白色結晶性粉末White or almost white crystalline powder | 
| 溶液外觀(guān) Appearance of the Solution | 透明無(wú)色至淺黃色Transparent colorless to light yellow | 
| pH值 pH value | 4.7~5.7 | 
| 比旋度 Specification Rotation | +8.0°~+10.09° | 
| 干燥失重 Loss on Drying | ≤0.5% | 
| 灼燒殘渣 Residue on Ignition | ≤0.1% | 
| 氯化物Chloride | ≤0.4% | 
| 硫酸鹽sulfate | ≤0.03% | 
| 重金屬(鉛) Heavy metal(Lead) | ≤10 ppm | 
| 鐵鹽 Ironic Salt | ≤10ppm | 
| 含量 Assay(drying basis) | 98.5~101.5% | 
| 微生物檢測 Microbial Test | |
| 總菌數 Total Aerobic | ≤1000cfu/g | 
| 霉菌和酵母 Yeast & Mold | ≤100cfu/g | 
| 大腸桿菌 E.coli | Negative | 
| 沙門(mén)氏菌 Salmonella | Negative | 
| Package: In 25Kg net per fiber drum, inner polythene bags. We can provide the packing as per your request. | |