 Trimellitic anhydride(TMA)
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Molecular formula：C9H4O5
Structural formula：
Property：
- Appearance：white flaky
- Melting point：165-168℃
- Solubility： soluble in hot water, acetone, ethyl acetate,cyclohexanone, soluble in absolute ethyl alcohol and react with it.
Main use： It is used to produce polyester resin,polyamide resin,plasticizer, sizing agent,smoke suppressor etc.
Trimellitic anhydride quality index：Enterprise standard Q/321181GSH008-2005
Item |
Index |
Best quality |
First quality |
Appearance |
white flaky |
white or light yellow flaky |
Purity % ≥ |
99.80 |
99.00 |
Acid number mgKOH/g ≥ |
873.00 |
865.00 |
Anhydride content % ≥ |
98.50 |
97.00 |
Melting point oC |
166.0～168.0 |
165．0～168.0 |
triethylene glycol(TEG)chroma,
Pt-Co ≤ |
35# |
50# |
Fuse chroma Pt-Co ≤ |
100# |
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PA ppm ≤ |
500 |
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