laevo-cysteine
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IUPAC name :(2R)-2-amino-3-sulfanylpropanoic acid
InChI :InChI=1/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1
InChIKey :XUJNEKJLAYXESH-REOHCLBHBU
SMILES :C([C@@H](C(=O)O)N)S
cas number :52-90-4
(EINECS) number :200-158-2
beilstein number :1721408
fema number :3263
coe number :10464
jecfa number :1419
fl. number :17.033
molar refractivity :28.90 ± 0.3 cm3
parachor :251.5 ± 4.0 cm3
index of refraction :1.549 ± 0.02
surface tension :58.9 ± 3.0 dyne/cm
density :1.334 ± 0.06 g/cm3
polarizability :11.45 ± 0.5 10-24cm3
XlogP : -2.60
molecular weight : 121.1581800 (IUPAC)
formula :C3 H7 N O2 S
BioActivity Analysis :48415836
NMR Predictor :Predict
 
 
export tariff code :2930.90
fda reg :172.320
184.1271

Suppliers :
Ajinomoto :L-CYSTEINE
DAB
Penta :laevo-cysteine
free base
SAFC Global® :L-Cysteine
≥97%

organoleptics :
odor type :sulfurous
odor description:
at 100.00 %.  
sulfury

properties :
appearence :white crystals
assay : 98.00 to 100.00 %   
Food Chemicals Codex Listed :No
melting point : 238.00 to 240.00 °C. @ 760.00 mm Hg
flash point :not determined
logP (o/w) : -2.49

safety :
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.
Oral Toxicity(LD50) : 
  Oral-Rat    1890.00  mg/kg

intravenous-Rat    1140.00  mg/kg

Intraperitoneal-Rat    1620.00  mg/kg

Oral-Mouse    660.00  mg/kg

intravenous-Mouse    1250.00  mg/kg

Intraperitoneal-Mouse    1400.00  mg/kg

Dermal Toxicity(LD50) : 
  Subcutaneous-Rat  1550.00  mg/kg

Subcutaneous-Mouse  1360.00  mg/kg

Inhalation Toxicity(LC50) : 
  Not determined
 

safety in use :
Category :special dietary and nutritional additives
Maximised Survey-derived Daily Intakes (MSDI-EU) :547.00 (μg/capita/day)
 
recommendation for laevo-cysteine fragrance usage levels up to :
 not for fragrance use.
recommendation for laevo-cysteine flavor usage levels up to :
 not for flavor use.

safety references :
European Food Safety Athority(efsa) :Flavor usage levels; Subacute, Subchronic, Chronic and Carcinogenicity Studies; Developmental / Reproductive Toxicity Studies; Genotoxicity Studies...
EPI System :view
ClinicalTrials.gov :search
Daily Med :search
NLM Hazardous Substances Data Bank :search
Chemical Carcinogenesis Research Information System :Search
Cancer Citations :Search
Toxicology Citations :Search
EPA GENetic TOXicology :Search
Env. Mutagen Info. Center :Search
NLM Developmental and Reproductive Toxicity :Search
Canada Domestic Sub. List :Yes
EPA Chem. Sub. Inventory : Yes
 
WGK Germany :3
 
 
 
 
(2R)-2-amino-3-sulfanylpropanoic acid
(EINECS) number :200-158-2
RTECS :HA1600000 for cas# 52-90-4
chemidplus :000052904
EPA Substance Registry Services :52-90-4

references :
 
(2R)-2-amino-3-sulfanylpropanoic acid
fl. number :17.033
jecfa number :1419
NIST Chemistry WebBook :52904
pubchem :148667

Cosmetics :
Cosmetic uses : antioxidants
antistatic agents
hair conditioning
hair straightening agents
hair waving agents
masking agents
reducing agents

other :
CosIng :cosmetic data
VCF-Online: VCF Volatile Compounds in Food
Dietary Supplements Labels Database : Search
FDA Everything Added to Food in the United States (EAFUS)View
synonyms :
(R)-2-amino-3-mercaptopropanoic acid
2-amino-3-mercaptopropanoic acid
(R)-2-amino-3-mercaptopropionic acid
(2R)-2-amino-3-sulfanyl propanoic acid
(2R)-2-amino-3-sulfanylpropanoic acid
alpha-amino-beta-mercaptopropanoic acid
laevo-alpha-amino-beta-mercaptopropanoic acid
beta-amino-beta-mercaptopropionic acid
laevo-alpha-amino-beta-mercaptopropionic acid
laevo-alpha-amino-beta-thiol propionic acid
(R)-cysteine
beta-mercaptoalanine

soluble in :
 alcohol
 water, 277000 mg/L @ 25C

insoluble in :
 acetone

potential uses :
 antioxidants
 antistatic agents
 hair conditioning
 hair straightening agents
 hair waving agents
 reducing agents

natural occurrence in :    note
 apple  
 cherry  
 grape  
 kiwi S
 nectarine  
 peach  
 pear  
 plum  
 prune juice  
 strawberry S

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