L-Cysteine is a non-essential sulfur-containing amino acid that can be synthesized in the human body from methionine and serine, and can also be obtained from natural foods such as meat, eggs, and legumes. Industrial production is primarily based on microbial fermentation, with a small portion still produced by hair hydrolysis (gradually being phased out). It appears as a white crystalline powder with a slightly bitter taste and excellent water solubility.
Core Applications
Food Industry
Bread Improvement & Preservation
As a dough reducing agent, L-cysteine breaks disulfide bonds, improving dough extensibility and fermentation performance. Finished bread volume increases by 15–20%, and shelf life extends by 5–7 days (slowing starch retrogradation).
Juice & Beverage Preservation
Inhibits polyphenol oxidase activity to prevent juice browning (particularly effective for apple and grape juice). Also helps retain vitamin C, reducing its loss rate by 30%.
Meat Processing
Added to sausages and ham (0.05%–0.1%) to enhance water retention and elasticity, reduce undesirable meaty odors, and extend refrigerated shelf life by 3–5 days.
Feed and Industrial Applications
Livestock & Poultry Feed:
For weaning piglet feed, it helps reduce stress responses and increases average daily gain by 10–12%.
In broiler fattening feed, it improves intestinal mucosal barrier function and increases feed conversion ratio by 8–10%.
Aquatic Feed:
Used in fish and shrimp nursery feed to enhance stress tolerance (e.g., poor water quality, transport stress). Survival rates improve from 70% to 85%, suitable for Pacific white shrimp and largemouth bass farming.
Industrial Uses:
Acts as an electroplating brightener to improve coating glossiness.
Used in the synthesis of biodegradable materials (poly-cysteine), including wastewater treatment agents.
Personal Care Industry (Fastest Growing Segment)
Hair Care Ingredients
Added to shampoos and hair masks; thiol groups help repair damaged hair cuticles, reduce split ends and static.
Used in perm solutions as a reducing agent to break keratin disulfide bonds, suitable for mild perm formulations.
Skin Care Ingredients
Added to anti-aging creams and serums for its free-radical-scavenging ability (three times the antioxidant capacity of vitamin C), improving dullness and fine lines.
Combined with ceramides (ratio 1:2) in sensitive-skin formulations to reduce redness (patch tests show no irritation).
Oral Care:
Used in toothpaste to inhibit bacterial growth and help reduce gum bleeding.
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CAS No. |
7048-04-6 |
|
Purity |
99% |
|
Type |
amino acid |
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Place of Origin |
Shandong, China |
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Classification |
amino acid |
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Other Names |
L-CYSTEINE HYDROCHLORIDE |
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MF |
C6H12ClNO2S |
|
EINECS No. |
\ |
|
Grade Standard |
Food Grade |
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Appearance |
White powder |
|
Application |
Food Additives |
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Certificate |
HALAL KOSHER ISO |
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Packing |
25kg/drum, or by customer demands |
|
MOQ |
27 MT |
|
Sample |
Available |
|
Shelf life |
2 years |
|
Packaging & Delivery |
Selling Units: Single item |
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