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VWR L(+)-Cysteine hydrochloride monohydrate 98.5-101.0% for biochemistry
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Formula: HSCH₂CH(NH₂)COOH·HCl·H₂O
Specifications:
Specification Test Results
| Assay (on anhydrous substance) | 98.5 - 101.0 % |
| Identification | Passes test |
| Spec.opt.rot.(80 g/l;HCl 250 g/l; dried) | 5.5 - 7.0 ° |
| Heavy metals (as Pb) | ≤ 10 ppm |
| Loss on drying (Vacuum<0.7 kPa, 24 h) | 8.0 - 12.0 % |
| SO₄ (Sulphate) | ≤ 300 ppm |
| Ninhydrin-positive substances (LC): | |
| Ammonium (570 nm) | ≤ 0.02 % |
| Any impurity | ≤ 0.2 % |
| Impurity A (570 nm) | ≤ 0.5 % |
| Total impurities | ≤ 1.0 % |
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