Substance profile
2-Methylpyridine
2-Methylpyridine is a colorless liquid with a strong unpleasant odor.
01 · Identification
What 2-Methylpyridine is
2-Methylpyridine is a colorless liquid with a strong unpleasant odor. It boils at 129 °C, melts at -66.6 °C, is miscible with water.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
Other names for 2-Methylpyridine
- 2-picoline
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H226 | Flammable liquid and vapour. |
| H332 | Harmful if inhaled. |
| H312 | Harmful in contact with skin. |
| H302 | Harmful if swallowed. |
| H335 | May cause respiratory irritation. |
| H319 | Causes serious eye irritation. |
Precautionary statements: P210, P233, P241, P242, P260, P264, P270, P271, P280, P301, P302, P304, P305, P312, P313, P330, P337, P338, P352, P403
03 · Physical and chemical properties
2-Methylpyridine properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 129.4 °C (264.9 °F) | HSDB | |
| 129 °C (264.2 °F) | at 760 mmHg | DOE PAC | |
| 128.33 °C (263 °F) | range, midpoint shown, at 760 mmHg | CAMEO | |
| Melting point | -66.65 °C (-88 °F) | HSDB | |
| -70 °C (-94 °F) | CAMEO | ||
| Density | 0.95 g/cm³ | ICSC | |
| 0.9443 g/cm³ | at 20 °C | HSDB | |
| 0.944 g/cm³ | at 20 °C | CAMEO | |
| Solubility | Very sol in acetone | HSDB | |
| Miscible with alcohol, ether | HSDB | ||
| Miscible in water at 20 °C | at 20 °C | HSDB | |
| Vapor pressure | 8.5507 mmHg | at 20.3 °C | HSDB |
| 8 mmHg | at 20 °C | CAMEO | |
| 11.2 mmHg | at 25 °C | HSDB | |
| Flash point | 38.89 °C (102 °F) | HSDB | |
| 36.11 °C (97 °F) | CAMEO | ||
| 26 °C (78.8 °F) | ICSC | ||
| Autoignition temperature | 537.78 °C (1000 °F) | HSDB | |
| 538 °C (1000.4 °F) | ICSC | ||
| Lower explosive limit (LEL) | 1.4 % by volume | ICSC | |
| Upper explosive limit (UEL) | 8.6 % by volume | ICSC | |
| Vapor density | 3.2 (air = 1) | HSDB | |
| 3.21 (air = 1) | CAMEO | ||
| Odor threshold | ...the odor treshold of this substance is relative low 0.05 - 0.1 ppm and is therefore a warning signal for exposure. | HSDB | |
| 0.05 mg/cu m (odor low); 0.17 mg/cu m (odor high). | HSDB | ||
| Odor Threshold Low: 0.01 [ppm] | Haz-Map | ||
| Critical temperature and pressure | 348.85 °C (659.9 °F) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 2-Methylpyridine
Incompatible materials
Mixtures with hydrogen peroxide + iron(II)sulfate + sulfuric acid may ignite & then explode.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
2-METHYLPYRIDINE is hygroscopic. This compound reacts with hydrogen peroxide, iron(II) sulfate, sulfuric acid, oxidizing agents, acids, and metals. (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 2-Methylpyridine in the storage compatibility matrix →