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Industrial maleic anhydride |
1. Brief introduction |
It is an important organic chemical intermediate used in the manufacture of plasticizers, paper treatment agents, unsaturated polyester resins etc. |
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2. Technical index (Q/CNPC - LZSH01 • 0007 - 2006/GB3676 - 1992) |
Item
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Index |
Best Quality |
First Quality
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Qualifier
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First grade |
Second grade |
Appearance |
white, yellowish lumpish or flaky crystal. |
content(Maleic anhydride), %(m / m) ≥ |
9 9. 5 |
99 . 5 |
99.0 |
98. 5 |
Thermal stability(140 °C, 2h)(Pt-Co), ≤ |
40 |
- |
- |
- |
Fusing Color(Pt-Co), ≤ |
20 |
25 |
50 |
100 |
Crystallization point, °C ≥ |
52.5 |
52.4 |
52.0 |
51.5 |
Ash content, %(m / m) ≤ |
0.005 |
0.005 |
0.005 |
- |
Fe content, mg /kg≤ |
5 |
5 |
- |
- |
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3. Packing & storage |
- I ndustrial Maleic anhydride is packed in large-mouthed iron drum, wool drum or woven bag lined with plastic bag; net wt. 25 kg or 50 kg; trademark should be printed outside.
- Acceptance certificate, name of manufacturer, batch NO., grade and net wt. should be marked.
- Stored in dry and airy place, avoid moisture, rain or solarization; shelf life is 3 months.
- No mixing with acids, alkalis, oxidants or corrosive substances; handle it with great care.
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