Antioxidant Protein Components Skin Care Ingredients L-Cystine

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Antioxidant Protein Components Skin Care Ingredients L-Cystine

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Product Description

Basic Info.

Appearance

Powder

Transport Package

Drum

Specification

99%

Origin

China

Product Description

Item	Specifications (AJI97)
Appearance	White crystalline powder
Assay, %	98.0~101.0
Specific rotation	+8.3°~+9.5°
Loss on drying, %	≤0.5
Transmittance, %	≥95.0
Chloride (as Cl), %	≤0.04
Sulfate (as SO₄), %	≤0.03
Ammonium (as NH₄), %	≤0.02
Iron (as Fe), %	≤0.001
Heavy Metals (as Pb), %	≤0.001
Arsenic (as As), %	≤0.0001
pH Value	4.5~5.5
Residue on ignition, %	≤0.1
Other amino acid	No detd

L-Cystine is a sulfur-containing amino acid that is present in small amounts in proteins and is contained in keratin such as hair and fingers. It forms white hexagonal plate crystals or crystalline powder. It is odorless and tasteless, soluble in dilute acid and alkaline solutions, very slightly soluble in water, and insoluble in ethanol, ether, and benzene.

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L-Cystine Production and Quality Testing

Product Functions

Biochemical Research & Cell Support: Useful in biological media preparation. It supports biochemistry and nutrition research, promotes cell oxidation-reduction, boosts white blood cell counts, and helps block pathogenic bacteria growth. It is widely used to prevent alopecia and assists with acute infectious conditions (dysentery, typhoid, flu), asthma, neuralgia, eczema, and toxicity disorders while supporting stable protein configuration.
Animal Nutrition Enhancer: Serves as a vital feed nutrient fortifier. It accelerates animal growth, supports healthy body weight increases, enhances liver and kidney performance, and improves overall fur quality.
Cosmetic Care: Promotes wound recovery, calms skin irritation, and targets eczema symptoms.

Applications

Food Field

Used as a nutritional supplement, flavor agent, and dough strength developer in bread making and baked items.

Medicine Field

Formulated in medical treatments to accelerate tissue healing, relieve skin allergies, act as an antidote, and stimulate blood generation.

Feed Field

Acts as an essential nutrient enhancer, boosting animal muscle development, kidney health, and quality of hair/fur.

Cosmetics

Utilized as an active ingredient in premium natural skin whitening formulations and irritation prevention cosmetics.

L-Cystine Quality Inspection Certifications

Frequently Asked Questions (FAQ)

What is L-Cystine and where is it found?

L-Cystine is a sulfur-containing amino acid. It naturally exists in small levels within proteins and is a major structural element in keratin, which builds up hair, nails, and skin tissue.

What are the primary solubility properties of L-Cystine?

L-Cystine is easily soluble in dilute acid and alkaline solutions. It is very slightly soluble in water and completely insoluble in common organic solvents like ethanol, ether, and benzene.

How does L-Cystine benefit animal feed formulations?

As a feed nutritional fortifier, it supports healthy growth, enhances weight gain, supports robust liver and kidney functions, and noticeably improves the density and texture of animal fur.

Can L-Cystine be used in baking and food processing?

Yes, in the food sector, it is highly valued as a dietary supplement, a flavor enhancer, and a natural dough-strengthening agent used alongside yeast leavening agents in baked products.

Does L-Cystine have skin care and cosmetics benefits?

Yes. In cosmetics, it functions as a natural skin whitening compound. It is also formulated to calm skin irritation, support eczema treatments, and accelerate skin healing.