L-Cysteine
44 Inquiries
52-90-4
Pharmaceutical Grade
99.5%
shanghai
25kg/drum
2026-08-20
Dimethyl sufoxide
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Product Description
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Seller Information
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Inquiry History
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DescriptionBasic Info
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Product Name:
L-Cysteine
Other Name:(R)-2-Amino-3-mercaptopropanoic acid;3-mercapto-l-alanin;alpha-amino-beta-mercaptopropionicacid;alpha-Amino-beta-thiolpropionic acid;alpha-amino-beta-thiolpropionicacid;Cystein;half-cysteine;L-Cysteine - animal origin
CAS No.:52-90-4
Molecular Formula:C3H7NO2S
InChIKeys:XUJNEKJLAYXESH-REOHCLBHSA-N
Molecular Weight:121.16
BRN:1721408
EC Number:200-158-2
TSCA:TSCA listed
Color/Form:White
HScode:29309012
Categories:
Characteristics-
λmax:
λ: 260 nm Amax: 1.5λ: 280 nm Amax: 0.2
Physical Properties:Solubility 28 (25 ℃) g/100 mL solution, 16 (20 ℃) g/100 g H2O, pI 5.02, dissociation constants: pK1 1.71, pK2 8.27 (–SH), pK3 10.78.
Density:1.197 (estimate)
Melting Point:240 °C (dec.) (lit.)
Boiling Point:293.9±35.0 °C(Predicted)
Refractive Index:8.8 ° (C=8, 1mol/L HCl)
Water Solubility:280 g/L (25 ºC)
Toxicity:LD50 orally in Rabbit: 1890 mg/kg
Odor:sulfury
PH:4.5-5.5 (100g/l, H2O, 20℃)
PKA:1.92(at 25℃)
Autoignition Temperature:420 °C
Critical Temperature & Pressure:Store below +30°C.
Hazard IdentificationClassification of the substance or mixture
Acute toxicity - Category 4, Oral
GHS label elements, including precautionary statements
Pictogram(s) 
Signal word Warning
Hazard statement(s) H302 Harmful if swallowed
Precautionary statement(s) Prevention P264 Wash ... thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
Response P301+P317 IF SWALLOWED: Get medical help.
P330 Rinse mouth.
Storage none
Disposal P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.
Other hazards which do not result in classification
no data available
Handling and StoragePrecautions for safe handling
Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Keep container tightly closed in a dry and well-ventilated place. Store under inert gas. Air sensitive. Storage class (TRGS 510): Non Combustible Solids.
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Seller Information
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Business Type:
Trader
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Main Products:
Dimethyl sufoxide
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Location:
Lianqian East Road650, Siming district, Xiamen, China
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Payment Terms:
TT against B/L draft before shipment,100% TT in advance
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Average lead Time:
5
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Total Annual Revenue:
$1 million-$2.5 million
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Total Employees:
5-10
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Year of Establishment:
2020
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Inquiry History44 Inquiries
Country Product Purchase Quantity Date Posted 
India
L-cysteine
5.00 KG Dec 2, 2025
India
L-Cysteine
100.00 KG Jun 7, 2025
India
L-Cysteine
1.00 KG Nov 25, 2025
India
L-Cysteine
1.00 KG May 13, 2025
India
L-Cysteine
1.00 KG Oct 8, 2024
India
L Cyteine
25.00 KG May 21, 2026
India
L-Cysteine
100 KG Dec 17, 2025
India
L-Cysteine
1.00 MT Sep 26, 2023
India
L-Cysteine
20.00 MT Dec 13, 2023
India
L-Cysteine
1.00 KG Jan 28, 2026
India
L-Cysteine
2.00 KG Jan 27, 2026 
Slovenia
L-CYSTEINE
400 KG Jan 20, 2026 
Egypt
L-Cysteine
1000 KG Jan 19, 2026
India
L-Cysteine
1.00 KG Sep 8, 2025 
Pakistan
L-Cysteine
50.00 KG May 6, 2025
India
L-Cysteine
1 MT Apr 23, 2025
India
L-Cystiene
10.00 KG Mar 26, 2025
India
L-Cysteine
1.00 KG Nov 14, 2024
India
L-Cysteine
1.00 KG Oct 28, 2024
India
L-Cysteine
10 KG Jun 11, 2024 Post an enquiry for this product
