HazMat Tool — substance information
Reference only — not a shipping paper, placard mandate, or CVI record.
Phthalic anhydride with more than .05 percent maleic anhydride
HMT 15 June 2026Phthalic anhydride with more than .05 percent maleic anhydride
Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first anhydride of a dicarboxylic acid to be used commercially Wikipedia
Substance Data
Source: PubChem (HSDB, 22.10.2026)CAS-Number85-44-9 |
Flash Point152 ° C | Boiling Point285.3 ° C |
| Emergency Response Guide No. 156 |
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(3) Hazard class8Corrosive liquids |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(7) Special Provisions (§172.102)
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| IB8 | |
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| IP3 | |
| T1 | |
| TP33 |
(8) Packing Authorizations (§173.***) 
| (8A) Exceptions | 154 | see 49 CFR §173.154 |
|---|---|---|
| (8B) Non-bulk | 213 | see 49 CFR §173.213 |
| (8C) Bulk | 240 | see 49 CFR §173.240 |
(9) Quantity Limits 
| (9A) Passenger aircraft/rail | 25 kg |
|---|---|
| (9B) Cargo aircraft only | 100 kg |
(10) Vessel stowage 
| (10A) Location | |
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| (10B) Other |
Segregation chart for load, transport, and storage
This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.
Hinweis: In der Kompatibilitätstabelle sind Stoffe der Gefahrenklasse 8 nur dann zu berücksichtigen, wenn der Stoff flüssig ist. Derzeit kann HazMat Tool nicht prüfen, ob der Stoff flüssig ist. Dies wird daher hier angenommen. Siehe PHMSA Interpretation #09-0252.
| Hazard class | 8![]() | 7![]() | 6.1![]() | 5.2![]() | 5.1![]() | 4.3![]() | 4.2![]() | 4.1![]() | 3![]() | 2.3B![]() | 2.3A![]() | 2.2![]() | 2.1![]() | 1.6![]() | 1.5![]() | 1.4![]() | 1.3![]() | 1.1/1.2![]() |
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| Must not be loaded, transported, or stored together in the same vehicle or facility. | |
| May be loaded, transported, or stored together. | |
| May be loaded, transported, or stored together only with restrictions. |