Phthalic Anhydride CAS 85-44-9
Purity >95%In StockPharmaceutical Standards
| CAS No. | 85-44-9 |
| Molecular Formula | C8H4O3 |
| Molecular Weight | 148.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Phthalic Anhydride (CAS 85-44-9) is a pharmaceutical standards certified reference material from CATO. Molecular formula: C8H4O3. Molecular weight: 148.12 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C8H4O3 |
| Molecular Weight | 148.12 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Phthalic Standards
- Phthalic Acid Anhydride-13C2 (CAS 1239918-30-9)
- Phthalic-d4 Anhydride (CAS 75935-32-9)
- Phthalic anhydride-<SUP>13</SUP>C<SUB>6</SUB> (CAS 1173019-01-6)
- Phthalic Acid (CAS 88-99-3)
- Phthalic Acid-13C2 (CAS 254110-94-6)
- Phthalic-13C Acid (CAS 70838-83-4)
- Phthalic-3,4,5,6-d4 Acid (CAS 87976-26-9)
- Phthalic-13C6 Acid (CAS 1313734-99-4)
Recommended Standards
- 4-Nitrobenzonitrile (CAS 619-72-7)
- 3-Ethynyl-4-fluorobenzaldehyde (CAS 100504-75-4)
- L-GLUTAMIC ACID-15N (CAS 21160-87-2)
- 4-[N-[2-(Acetamido)ethyl]-N-methylamino]-2-carboxy-2-hydroxybenzophenone (CAS 203580-77-2)
- 3-{4-[(4-ethylpiperazin-1-yl)sulfonyl]phenyl}propanoic acid (CAS 1044511-26-3)
- 2-Bromo-3-(chloromethyl)-6-methylpyridine (CAS 1227493-83-5)
- 2-Hydroxy-4-(pentyloxy)benzaldehyde (CAS 89027-79-2)
- S-Adenosyl-L-Methionine Impurity 26 4-sulfobutane-1-sulfonate (CAS CATO-C4X-138126)
- (2R,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydrobenzo[b][1,4]thiazepin-4(5H)-one (CAS 30825-34-4)
- Ac-(5-31)Semaglutide (CAS CATO-C4X-2226279)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 13829788188 / jacky.chen@cato-chem.com