Tetrachlorophthalic Anhydride
[English abbreviation] : TCPA
[Chinese name] : tetrachloro-phthalic anhydride
[Chinese alias] : tetrachlorophenic anhydride
[CAS number] : 117-08-8
[Molecular formula ] : C8Cl4O3
[Molecular weight] : 285.9
[Packing] : Lined with plastic woven bag, each bag 25 kg.
[Usage] : Used in medicine, pigments, dyes, flame retardants, etc.
item | index | |||||
Refined product | Superior quality | firsts | second | Qualified product | ||
appearance | White crystal or powder | |||||
Purity (mass fraction)／%≥ | Gas chromatography | — | 99.0 | — | 99.0 | 99.0 |
Liquid chromatography | 98.5 | — | 99.0 | — | — | |
Fusing point／℃≥ | 256.0 | 255.5~258.0 | 256.0~258.0 | 255.5~258.0 | 255.5~258.0 | |
Drying weight loss／%≤ | — | 0.50 | 0.50 | 0.50 | 0.50 | |
Solubility in xylene／% | 100 | — | — | 100 | 100 | |
Chroma Hazen unit≤ | In xylene | 50 | — | — | 150 | — |
In methanol | — | 150 | — | — | — | |
In ethanol | — | — | 10 | — | — | |
Free acid (mass fraction)/%≤ | — | 0.50 | 0.50 | 0.50 | 0.50 | |
Free chlorine (mass fraction)/%≤ | — | 0.001 | 0.001 | 0.001 | 0.001 | |
Iron content (mass fraction)/ppm≤ | 30 | 10 | — | 10 | 10 | |
Alkali insoluble matter/%≤ | — | 0.50 | — | — | — | |
Hexachlorobenzene (mass fraction)/%≤ | 0.015 | 0.100 | 0.100 | 0.100 | — | |
Sulfate (mass fraction)/%≤ | 0.010 | — | — | — | — | |
Tetrachloro-phthalate (mass fraction)/%≤ | 0.7 | — | — | — | — | |
Moisture (mass fraction)/%≤ | 0.04 | — | — | — | — | |
