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By certification 
| Trimellitic anhydride (TMA) | ||
| Molecular formula: | C9H4O5 | |
| Structural formula: |  |
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| CAS No.: | 552-30-7 | |
| Physical and chemical properties: | Appearance: white or light yellow flake. | |
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Solubility: soluble in hot water, acetone, N,N-dimethylformamide, ethyl acetate, cyclohexanone, soluble in absolute ethanol and reactive with it. | ||
| Uses: |
TMA is mainly used to produce plasticizer (TOTM), polyester resin for powder coating, polyurethane resin for insulation varnish, water-soluble alkyd resin coating, epoxy curing agent, heat-resistant laminates, synthetic dyes, heat-resistant varnish, stabilizer, softener for fibers, pigment, water treatment agent, filmstrip and surfactant etc. |
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| Packing: |
25kg kraft paper composite bag lined with plastic, 500kg or 1000kg woven bag lined with plastic. |
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| Quality index: | Item | Quality index |
| Appearance | white or light yellow flake | |
| Acid value, mgKOH/g ≥ | 873 | |
| Anhydride content, wt% ≥ | 98 | |
| Melting point, ℃ ≥ | 164 | |
| Melt color (Pt－Co) ≤ | 130# | |
| PA content, ppm ≤ | 300 (Superior≤100) | |
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