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CAS RN: 18637-83-7 | Product Number: O0200


Purity: >95.0%(T)
2   ≥20 
1   19  

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Product Number O0200
Purity / Analysis Method >95.0%(T)
Molecular Formula / Molecular Weight C__8H__6N__4O__2 = 190.16  
Physical State (20 deg.C) Solid
Storage Temperature 0-10°C
Store Under Inert Gas Store under inert gas
Condition to Avoid Air Sensitive,Moisture Sensitive,Heat Sensitive
CAS RN 18637-83-7
Reaxys Registry Number 611833
PubChem Substance ID 87574196
MDL Number


Appearance Light yellow to Brown to Dark green powder to crystal
Purity(Nonaqueous Titration) min. 95.0 %
Properties (reference)
Pictogram Pictogram
Signal Word Warning
Hazard Statements H315 : Causes skin irritation.
H319 : Causes serious eye irritation.
Precautionary Statements P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ eye protection/ face protection.
P302 + P352 : IF ON SKIN: Wash with plenty of water.
P337 + P313 : If eye irritation persists: Get medical advice/ attention.
P362 + P364 : Take off contaminated clothing and wash it before reuse.
P332 + P313 : If skin irritation occurs: Get medical advice/ attention.
Related Laws:
Transport Information:
HS Number 2933299090
Condensing Agent

Experimental procedure2): A stirred solution of N-protected α-amino acid (10 mmol) in acetonitrile (30 mL) is cooled to 10 °C and treated with 1,1'-oxalyldiimidazole (2.09 g, 11 mmol) while maintaining the reaction temperature at below 15 °C. Stirring is continued for 1 h at 15-20 °C, then a mixture of α-amino acid ester hydrochloride (10 mmol) and triethylamine (10 mmol) in acetonitrile (5 mL) is added. The resultant mixture is stirred for 2 h at 10-15 °C. After removal of the solvent in vacuo, the residue is dissolved in ethyl acetate and the organic solution is washed with 5% NaHCO3, 2% HCl, and brine, then dried over anhydrous Na2SO4. The organic solvent is evaporated off in vacuo to give the crude dipeptide, which is purified by recrystallization.


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