1-9 Kilograms
$12.40
≥10 Kilograms
$1.00
L-Cysteine hydrochloride anhydrous is White crystal or crystalline powder, slightly smelly, taste acid, soluble in water, ammonia water, acetic acid, slightly soluble in ethanol, acetone, ethyl acetate, benzene, carbon disulfide, carbon tetrachloride. In neutral or slightly alkaline soletion easy be air oxidation into cystine, trace iron and heavy metal ions can promote oxidation. Its hydrochloride is stable, so generally made hydrochloride.
| Item | Specifications | |
| USP | AJI | |
| Appearance | White crystals or crystalline powder; strongly acid taste. | |
| Identification | Infrared Absorption | --- |
| Specific optical rotation | +5.6 °- +8.9 ° | +5.5 °- +7.0 ° |
| State of solution (Transmittance) | --- | ≥ 98.0% clear and colorless |
| Chloride (Cl) | --- | 19.89-20.29% |
| Ammonium(NH4) | --- | ≤ 0. 002% |
| Sulfate | ≤ 0. 03 % | ≤ 0. 020% |
| Iron | ≤ 0. 003 % | 10ppm |
| Heavy Metals (as Pb), | ≤ 0.00 15% | ≤ 10ppm |
| Arsenic (as As), | --- | ≤ 1ppm |
| Other amino acids | --- | Not detected |
| Organic volatile impurities | Meets the requirement | --- |
| Loss on drying, | 8-12 % | 8.5-12 % |
| Residue on ignition, | c | ≤ 0.1 0 % |
| Assay | 98.5-101.5 % | 9 9.0-10 0.5 % |
| pH value | --- | 1.5-2.0 |
| Organic volatile impurities | Meets the requirement | --- |
| Chromatographic purity | 0.5% max Individual impurity, 2% max total | --- |
1.Food grade: flour improver, nutritional supplement, antioxidants.
2.Medicine grade: In pharmacy, Cysteine is used in the treatment of radioactive drugs poison, heavy metal poison, toxic hepatitis, serum sickness, and can prevent liver degeneration.
3.Comestic grade: whiting skin, dissolving cutin, anti-aging. The component of cosmetics
marcel extract, sunscreen, germinal perfume, hair essence.Application:
Qingdao Sigma Chemical Co., Ltd.is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.
The aim of Qingdao Sigma Chemical Co., Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.
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