Melting point |
234-236.5 °C(lit.) |
Boiling point |
178°C |
Density |
1.23 |
FEMA |
2224 | CAFFEINE |
refractive index |
1.6590 (estimate) |
Flash point |
178°C |
storage temp. |
2-8°C |
solubility |
Sparingly soluble in water, freely soluble in boiling water, slightly soluble in ethanol (96 per cent). It dissolves in concentrated solutions of alkali benzoates or salicylates. |
pka |
pKa 0.6 (Uncertain) |
form |
Crystals or Crystalline Powder |
color |
Silky white or white |
Odor |
at 100.00 %. odorless |
PH |
pH (10g/l, 25℃) : 5.5~6.5 |
Odor Type |
odorless |
Water Solubility |
20 g/L (20 ºC) |
Sublimation |
178 ºC |
Merck |
14,1636 |
BRN |
17705 |
Stability |
Stable. Incompatible with strong acids, strong bases, strong oxidizing agents, iodine, silver salts, tannins. Weakly light sensitive in solution. |
LogP |
-0.07 |
CAS DataBase Reference |
58-08-2(CAS DataBase Reference) |
IARC |
3 (Vol. 51) 1991 |
NIST Chemistry Reference |
Caffeine(58-08-2) |
EPA Substance Registry System |
Caffeine (58-08-2) |