Substance profile
Benzene-1,2,4-tricarboxylic acid 1,2-anhydride
Benzene-1,2,4-tricarboxylic acid 1,2-anhydride is crystals.
01 · Identification
What Benzene-1,2,4-tricarboxylic… is
Benzene-1,2,4-tricarboxylic acid 1,2-anhydride is crystals. Its molecular formula is C9H4O5 and its molecular weight is 192.12 g/mol. It boils at 390 °C, melts at 161 °C.
Under the GHS it carries the signal word Danger.
Other names for Benzene-1,2,4-tricarboxylic…
- trimellitic anhydride
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 |
|---|---|
| H335 | May cause respiratory irritation. |
| H318 | Causes serious eye damage. |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled. |
| H317 | May cause an allergic skin reaction. |
Precautionary statements: P261, P272, P280, P305, P310, P313, P333, P338
03 · Physical and chemical properties
Benzene-1,2,4-tricarboxylic… 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 | 390 °C (734 °F) | HSDB | |
| 242.5 °C (468.5 °F) | range, midpoint shown, at 14 mmHg (reduced pressure) | HSDB | |
| Melting point | 161.11 °C (322 °F) | NIOSH | |
| 162.25 °C (324.1 °F) | range, midpoint shown | HSDB | |
| 166.94 °C (332.5 °F) | range, midpoint shown | CAMEO | |
| Density | 1.55 g/cm³ | at 20 °C | CAMEO |
| Solubility | less than 1 mg/mL at 68 °F (NTP, 1992) | at 20 °C | CAMEO |
| 36.5 g/100 g 2-butanone at 25 °C; 38.4 g/100 g cyclohexanone at 25 °C; 0.06 g/100 g mineral spirits at 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 0.000004 mmHg | HSDB | |
| 0.000004 mmHg | at 25 °C | CAMEO | |
| Flash point | 227 °C (440.6 °F) | CAMEO | |
| Lower explosive limit (LEL) | Finely dispersed particles form explosive mixtures in air. | HSDB | |
| Combustible Solid | NIOSH | ||
| Vapor density | 6.6 (air = 1) | HSDB | |
| Critical temperature and pressure | 569 °C (1056.2 °F) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Benzene-1,2,4-tricarboxylic…
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Solubility
Sol at 25 °C: 0.002 g/100 g carbon tetrachloride; 0.06 g/100 g ligroin; 0.4 g/100 g mixed xylenes; 15.5 g/100 g dimethyl formamide; 49.6 g/100 g acetone; 21.6 g/100 g ethyl acetate
Source: HSDB
05 · Handling and storage
Storing and handling Benzene-1,2,4-tricarboxylic…
Storage conditions
Dry. Separated from bases and strong oxidants. Ventilation along the floor.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Reacts violently with bases and oxidants. Reacts slowly with water to form trimellitic acid.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
TRIMELLITIC ANHYDRIDE reacts exothermically with water. This reaction is expected to be slow, but can become vigorous if local heating accelerates it. Reaction with water is accelerated by acids. Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases. Incompatible with strong oxidizing agents, strong acids or strong bases. (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Benzene-1,2,4-tricarboxyl… in the storage compatibility matrix →