| Melting point |
8.2-8.4 °C (lit.) |
| Boiling point |
100-101 °C (lit.) |
| Density |
1.22 g/mL at 25 °C (lit.) |
| vapor density |
1.03 (vs air) |
| vapor pressure |
52 mm Hg ( 37 °C) |
| refractive index |
n20/D 1.377 |
| FEMA |
2487 | FORMIC ACID |
| Flash point |
133 °F |
| storage temp. |
2-8°C |
| solubility |
H2O: soluble1g/10 mL, clear, colorless |
| form |
Liquid |
| pka |
3.75(at 20℃) |
| color |
APHA: ≤15 |
| Specific Gravity |
1.216 (20℃/20℃) |
| PH |
3.47(1 mM solution);2.91(10 mM solution);2.38(100 mM solution); |
| Odor |
at 0.10 % in water. pungent vinegar formyl |
| Odor Type |
acetic |
| explosive limit |
12-38%(V) |
| Water Solubility |
MISCIBLE |
| Sensitive |
Hygroscopic |
| λmax |
λ: 260 nm Amax: 0.03
λ: 280 nm Amax: 0.01 |
| JECFA Number |
79 |
| Merck |
14,4241 |
| BRN |
1209246 |
| Henry's Law Constant |
At 25 °C: 95.2, 75.1, 39.3, 10.7, and 3.17 at pH values of 1.35, 3.09, 4.05, 4.99, and 6.21,
respectively (Hakuta et al., 1977) |
| Dielectric constant |
58.0（16℃） |
| Exposure limits |
TLV-TWA 5 ppm (～9 mg/m3) (ACGIH,
MSHA, OSHA, and NIOSH); IDLH 100
ppm (180 mg/m3) (NIOSH). |
| Stability |
Stable. Substances to be avoided include strong bases, strong oxidizing agents and powdered metals, furfuryl alcohol. Combustible. Hygroscopic. Pressure may build up in tightly closed bottles, so bottles should be opened carefully and vented periodically. |
| InChIKey |
BDAGIHXWWSANSR-UHFFFAOYSA-N |
| LogP |
-0.540 |
| CAS DataBase Reference |
64-18-6(CAS DataBase Reference) |
| NIST Chemistry Reference |
Formic acid(64-18-6) |
| EPA Substance Registry System |
Formic acid (64-18-6) |
