Preferred name | laevo-cysteine |
Trivial Name | L-(+)-Cysteine |
Short Description | propanoic acid, 2-amino-3-mercapto-, (R)- |
Formula | C3 H7 N O2 S |
CAS Number | 52-90-4 |
Deleted CAS Number | 154605-72-8 |
FEMA Number | 3263 |
Flavis Number | 17.033 |
ECHA Number | 200-158-2 |
FDA UNII | K848JZ4886 |
Nikkaji Number | J9.167G |
Beilstein Number | 1721408 |
MDL | MFCD00064306 |
COE Number | 10464 |
Bio Activity Summary | External link |
NMR Predictor | External link |
JECFA Food Flavoring | 1419 L-cysteine |
FDA Patent | No longer provide for the use of these seven synthetic flavoring substances |
FDA Mainterm | 52-90-4 ; L-CYSTEINE |
Synonyms |
|
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Google Books | Start search |
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Perfumer & Flavorists | Start search |
EU Patents | Start search |
PubMeb | Start search |
NCBI | Start search |
(2R)-2-amino-3-sulfanylpropanoic acid | |
NIST Chemistry WebBook: | Search Inchi |
Canada Domestic Sub. List: | 52-90-4 |
Pubchem (cid): | 5862 |
Pubchem (sid): | 134970857 |
(IUPAC): | Atomic Weights of the Elements 2011 (pdf) |
Videos: | The Periodic Table of Videos |
tgsc: | Atomic Weights use for this web site |
(IUPAC): | Periodic Table of the Elements |
FDA Substances Added to Food (formerly EAFUS): | View |
CHEBI: | View |
CHEMBL: | View |
Golm Metabolome Database: | Search |
Metabolomics Database: | Search |
KEGG (GenomeNet): | C00097 |
HMDB (The Human Metabolome Database): | HMDB00574 |
FooDB: | FDB012678 |
YMDB (Yeast Metabolome Database): | YMDB00046 |
Export Tariff Code: | 2930.90.5050 |
FDA Listing of Food Additive Status: | View |
VCF-Online: | VCF Volatile Compounds in Food |
ChemSpider: | View |
Wikipedia: | View |
Formulations/Preparations: ...occurs naturally in the l(+) form. available commercially as l(+)-cysteine hydrochloride. |
Material listed in food chemical codex | No |
Molecular weight | 121.15918731689 |
Melting Point | 238 to 240°C @ 760 mm Hg |
Vapor Pressure | 2.0E-6 mmHg @ 25 °C |
Flash Point TCC Value | 131.5 °C TCC |
logP (o/w) | -2.49 |
Solubility | |
alcohol | Yes |
water, 1.132e+005 mg/L @ 25 °C (est) | Yes |
water, 2.77E+05 mg/L @ 25 °C (exp) | Yes |
acetone | No |
(data available) |
Applications | |
Other purposes | Antioxidants , Antistatic agents , Hair conditioning , Hair straightening agents , Hair waving agents , Reducing agents |
Cosmetic purposes | Antioxidants , Antistatic agents , Fragrance , Hair conditioning , Hair straightening agents , Hair waving agents , Reducing agents |
Preferred SDS: View | |
European information : | |
Most important hazard(s): | |
Xn - Harmful. | |
R 22 - Harmful if swallowed. S 02 - Keep out of the reach of children. S 20/21 - When using do not eat, drink or smoke. S 22 - Do not breath dust. S 24/25 - Avoid contact with skin and eyes. S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S 36 - Wear suitable protective clothing. | |
Hazards identification | |
Classification of the substance or mixture | |
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS) | |
None found. | |
GHS Label elements, including precautionary statements | |
Pictogram | |
Hazard statement(s) | |
None found. | |
Precautionary statement(s) | |
None found. | |
Oral/Parenteral Toxicity: | |
oral-rat LD50 1890 mg/kg KIDNEY, URETER, AND BLADDER: OTHER CHANGES IN URINE COMPOSITION BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) LUNGS, THORAX, OR RESPIRATION: DYSPNEA Agents and Actions, A Swiss Journal of Pharmacology. Vol. 4, Pg. 125, 1974. intravenous-rat LD50 1140 mg/kg Journal of the American College of Toxicology. Vol. 12, Pg. 113, 1993. intraperitoneal-rat LD50 1620 mg/kg BEHAVIORAL: ATAXIA BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION Oyo Yakuri. Pharmacometrics. Vol. 7, Pg. 1251, 1973. oral-mouse LD50 660 mg/kg Archives of Toxicology. Vol. 41, Pg. 79, 1978. intravenous-mouse LD50 1250 mg/kg Yakugaku Zasshi. Journal of Pharmacy. Vol. 89, Pg. 1138, 1969. intraperitoneal-mouse LD50 1400 mg/kg LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION BEHAVIORAL: ATAXIA BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) Oyo Yakuri. Pharmacometrics. Vol. 7, Pg. 1251, 1973. | |
Dermal Toxicity: | |
subcutaneous-rat LD50 1550 mg/kg BEHAVIORAL: ATAXIA BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION Oyo Yakuri. Pharmacometrics. Vol. 7, Pg. 1251, 1973. subcutaneous-mouse LD50 1360 mg/kg BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION BEHAVIORAL: ATAXIA Oyo Yakuri. Pharmacometrics. Vol. 7, Pg. 1251, 1973. | |
Inhalation Toxicity: | |
Not determined |
Category: | |||
special dietary and nutritional additives | |||
Recommendation for laevo-cysteine usage levels up to: | |||
not for fragrance use. | |||
Maximised Survey-derived Daily Intakes (MSDI-EU): | 547.00 (μg/capita/day) | ||
Use levels for FEMA GRAS flavoring substances on which the FEMA Expert Panel based its judgments that the substances are generally recognized as safe (GRAS). | |||
The Expert Panel also publishes separate extensive reviews of scientific information on all FEMA GRAS flavoring substances and can be found at FEMA Flavor Ingredient Library | |||
publication number: 5 | |||
Click here to view publication 5 | |||
average usual ppm | average maximum ppm | ||
baked goods: | - | 100.00000 | |
beverages(nonalcoholic): | - | 100.00000 | |
beverages(alcoholic): | - | - | |
breakfast cereal: | - | 100.00000 | |
cheese: | - | - | |
chewing gum: | - | - | |
condiments / relishes: | - | 100.00000 | |
confectionery froastings: | - | - | |
egg products: | - | - | |
fats / oils: | - | - | |
fish products: | - | - | |
frozen dairy: | - | - | |
fruit ices: | - | - | |
gelatins / puddings: | - | - | |
granulated sugar: | - | - | |
gravies: | - | 100.00000 | |
hard candy: | - | - | |
imitation dairy: | - | - | |
instant coffee / tea: | - | - | |
jams / jellies: | - | - | |
meat products: | - | 100.00000 | |
milk products: | - | 100.00000 | |
nut products: | - | - | |
other grains: | - | - | |
poultry: | - | - | |
processed fruits: | - | - | |
processed vegetables: | - | - | |
reconstituted vegetables: | - | - | |
seasonings / flavors: | - | - | |
snack foods: | - | - | |
soft candy: | - | - | |
soups: | - | 100.00000 | |
sugar substitutes: | - | - | |
sweet sauces: | - | - |
European Food Safety Athority(EFSA):Flavor usage levels; Subacute, Subchronic, Chronic and Carcinogenicity Studies; Developmental / Reproductive Toxicity Studies; Genotoxicity Studies... |
European Food Safety Authority (EFSA) reference(s): |
Amino acids from chemical group 34 Flavouring Group Evaluation 26, Revision 1 - Scientific opinion of the Panel on Food Additives, Flavourings, Processing Aids and Materials in contact with Food (AFC) View page or View pdf |
Flavouring Group Evaluation 29 (FGE29)[1] - Substance from the priority list: Vinylbenzene from chemical group 31 - Scientific Opinion of the Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food (AFC) View page or View pdf |
Flavouring Group Evaluation 79, (FGE.79)[1] - Consideration of amino acids and related substances evaluated by JECFA (63rd meeting) structurally related to amino acids from chemical group 34 evaluated by EFSA in FGE.26Rev1 (2008) View page or View pdf |
Scientific Report of EFSA on the risk assessment of salts of authorised acids, phenols or alcohols for use in food contact materials [1] View page or View pdf |
Opinion of the Scientific Panel on food additives, flavourings, processing aids and materials in contact with food (AFC) related to the use of L-cysteine in foods intended for infants and young children View page or View pdf |
Review of substances/agents that have direct beneficial effect on the environment: mode of action and assessment of efficacy View page or View pdf |
Scientific Opinion on the safety and efficacy of the use of amino acids (chemical group 34) when used as flavourings for all animal species View page or View pdf |
Scientific Opinion on Flavouring Group Evaluation 49, Revision 1 (FGE.49Rev1): xanthine alkaloids from the priority list View page or View pdf |
Outcome of the consultation with Member States and EFSA on the basic substance application for L-cysteine for use in plant protection as insecticide View page or View pdf |
EPI System: View |
ClinicalTrials.gov:search |
Daily Med:search |
Chemical Carcinogenesis Research Information System:Search |
AIDS Citations:Search |
Cancer Citations:Search |
Toxicology Citations:Search |
EPA GENetic TOXicology:Search |
EPA Substance Registry Services (TSCA):52-90-4 |
EPA ACToR:Toxicology Data |
EPA Substance Registry Services (SRS):Registry |
Laboratory Chemical Safety Summary :5862 |
National Institute of Allergy and Infectious Diseases:Data |
WGK Germany:1 |
(2R)-2-amino-3-sulfanylpropanoic acid |
Chemidplus:0000052904 |
RTECS:HA1600000 for cas# 52-90-4 |