Executive standard: maleic anhydride for industrial use (GB/T 3676-2008)
Technical requirements for maleic anhydride for industrial use:
Item | Index | |
Superior products | Qualified products | |
Content(C4H2O3)/% ≥ | 99.5 | 99.0 |
Melting chromaticity ≤ | 25 | 50 |
Crystallization point/℃ ≥ | 52.5 | 52.0 |
Burning residue/% ≤ | 0.005 | |
Fe/(μg/g) ≤ | 3 | — |
Melting chroma after heating ≤ | Negotiated and determined | — |