5-Methylcytosine

  • 4-Amino-2-hydroxy-5-methylpyrimidine
  • 4-Amino-5-methyl-2(1H)-pyrimidinone
Formula
C5H7N3O
Structure
Description
Crystalline powder.

Registry Numbers and Inventories.
CAS
554-01-8
EC (EINECS/ELINCS)
209-058-3
Merck
12,6128

Properties.
Formula
C5H7N3O
Formula mass
125.13
Melting point, °C
270 (decomposes)
Density
1.44 g/cm3 (20 C)
Solubility in water
Soluble
pKa/pKb
10.13 (pKa)
Partition coefficient, pKow
-1.70

Hazards and Protection.
Storage
Keep container tightly sealed. Store in cool, dry conditions in well sealed containers.
Protection
Impervious gloves, safety glasses and protective work clothing.
Stability
Decomposition will not occur if used and stored according to specifications.

Fire.
Fire fighting
Extinguish with carbon dioxide, extinguishing powder or water spray. Fight larger fires with water spray or alcohol resistant foam. Wear self-contained respirator. Wear fully protective impervious suit.
Health
1
 
Flammability
1
 
 
Reactivity
1
 

Health.
Exposure effects

First aid
 
   Ingestion
Seek medical treatment.
   Inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm. Seek immediate medical advice.
   Skin
Rinse opened eye for several minutes under running water. Then consult a doctor.
   Eyes
Immediately wash with water and soap and rinse thoroughly. Seek immediate medical advice.

Transport.