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Contact SupplierPRODUCT | PHTHALIC ANHYDRIDE | |||
OPERATIVE | GB/T 15336-2013 | |||
NO. | CHECK ITEM | QUALITY INDEX | RESULTS | |
1 | APPEARANCE | WHITE NEEDLE SHAPED CRYSTALS OR FLAKE-SHAPED SRYSTALS | WHITE NEEDLE SHAPED CRYSTALS | |
2 | Fused chroma(Chroma No.) | ≤20 | 10 | |
3 | Chroma of therma stability(Chroma No.) | ≤40 | 30 | |
4 | Chroma of sulphuric acid(Chroma No.) | ≤40 | 20 | |
5 | Free acid(Mass fraction)% | ≤0.10 | 0.028 | |
6 | Purity% | ≥99.9 | 99.94 | |
7 | Benzoic Acid% | ≤0.05 | 0.001 | |