Amazon Supplier Food grade L-Cysteine Powder CAS 52-90-4

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Product details

Uses and synthesis of L-Cysteine Powder

L-Cysteine Raw Materials A common amino acid found in living organisms. It is one of the α-amino acids containing sulfur (high school humanistic chemistry elective 5 defines amino acid does not contain sulfur), L-Cysteine CAS 52-90-4 meets nitroprusside (nitroprusside) to show a purple color (because of the color of SH), exists in many proteins, glutathione, and Ag +, Hg +, Cu + and other metal ions can be formed into an insoluble salt of mercaptide (mercaptide). mercaptide). That is, R-S-M′, R-S-M″-S-R (M′, M″ each for the 1-valent, 2-valent metal). Molecular formula C3H7NO2S, molecular weight 121.16, colorless crystal.

L-Cysteine Powder is soluble in water, ethanol, acetic acid and ammonia, insoluble in ether, acetone, ethyl acetate, benzene, carbon disulfide and carbon tetrachloride. It can be oxidized to cystine by air in neutral and weakly alkaline solution.

Hot sale products on Henrikang Amazon and Alibaba.L-Cysteine Powder is used in bread to promote the formation of gluten, fermentation, molding and aging.

Applications / Functions of L-Cysteine Powder

L-Cysteine Powder properties and stability

L-Cysteine Powder colorless to white fine columnar crystals or white crystalline powder, with a slight special smell and taste (slightly acidic). Reducing, antioxidant and preventing non-enzymatic browning.L-Cysteine CAS 52-90-4Melting point 175℃(decomposition). Soluble in water, aqueous solution is acidic, pH value in 3% is 1.2, 1% is 1.7, 0.1% is 2.4. L-Cysteine CAS 52-90-4 is also soluble in ethanol, ammonia and acetic acid, insoluble in ether, acetone, benzene, carbon disulfide and chloroform. L-Cysteine is one of the amino acids, but is a non-essential amino acid.

Grade Comparison.

Production method of L-Cysteine Powder

• 1.Tin grain reduction method Dissolve cysteine in dilute hydrochloric acid, filter, filtrate add tin grain temperature reflux for 2 h. Dilute the reduction solution with water, remove the remaining tin grains, saturated with hydrogen sulfide, filtration, filtrate slag with a small amount of water, wash, filtrate, combined under reduced pressure, concentrated, cooled crystallization, filtration, drying L-cysteine hydrochloride.
• 2. Electrolysis reduction method Add distilled water, hydrochloric acid, cystine into the electrolysis tank and stir to dissolve, maintain at 50 ℃ below the electrolysis to the end point. The electrolyte will be passed through the hydrogen sulfide for a few hours, filtration. The filtrate is decolorized by adding activated carbon, concentrated under reduced pressure after filtration, crystallized by cooling, filtered and dried to obtain L-cysteine hydrochloride.
• 3. Synthesis: can be hydrolyzed by protein (such as human hair) hydrochloric acid, then treated with copper oxide, hydrogen sulfide decomposition. Can also be obtained from the degradation of cystine.

1.  tin reduction method will dissolve cystine in dilute hydrochloric acid, filtration, filtrate add tin reflux temperature 2h. will reduce the solution diluted with water, remove the remaining tin particles, through the hydrogen sulfide saturation, filtration, filtering, slag with a small amount of water to wash, wash, filtrate, combined, concentrated under reduced pressure, cooled to crystallization, filtration, drying to get L-cysteine hydrochloride.
2. Electrolysis reduction method will be distilled water, hydrochloric acid, cystine into the electrolysis tank stirring dissolved, maintained at 50 ℃ below the electrolysis to the end point. The electrolyte will be passed through the hydrogen sulfide for a few hours, filtration. The filtrate was decolorized by adding activated carbon, concentrated under reduced pressure after filtration, crystallized by cooling, filtered and dried to obtain L-cysteine hydrochloride.

l cysteine vs nac.

Comparison of application fields.

FAQ.

Q: Fermentation vs synthetic production?
A: Fermentation offers more stable rotation (+9.2±0.3°) with lower solvent risk, but costs 25-30% more.

Q: How to identify quality L-Cysteine?
A: Three-step verification:

Solubility test (should be clear)

Sulfur odor check (mild characteristic)

Potassium ferricyanide reaction (instant color)

Q: Difference from N-Acetylcysteine?
A: NAC has 30% higher bioavailability but poor thermal stability - L-Cysteine remains preferred for food applications.

Use the product safely.

The U.S. Food and Drug Administration (FDA) is an important agency of the U.S. federal government responsible for regulating food, drugs, medical devices, cosmetics, biological products, and tobacco products to ensure their safety, effectiveness, and quality. Food and dietary supplements can support your overall health, please use them wisely.

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