C8H6O2
134.13 g/mol
Industrial ChemicalDanger
O-Phthalaldehyde
CAS643-79-8EC211-402-2
Category
Industrial Chemical
Compound Class
Aromatic
Primary Use
reagent for amino acid analysis
o-This compound (OPA) is a chemical compound that appears as a pale yellow solid. It is commonly used as a reagent in the analysis of amino acids and as a building block for synthesizing heterocyclic compounds.
reagent for amino acid analysisbuilding block in heterocyclic compound synthesis
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
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Synthesis of organophosphines
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antimicrobial preservative in cosmetics
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ceramic material precursor
ReferenceSame Category
2-Fluorobiphenyl
CAS64420-95-7
Chemical intermediate for synthesis
Safety Reference
Danger
H228Flammable solid
H301Toxic if swallowed
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H317May cause an allergic skin reaction
H318Causes serious eye damage
H335May cause respiratory irritation
H373May cause damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for O-Phthalaldehyde (CAS 643-79-8) is 2912.29.
HS code (international, 6-digit)
2912.29
EU CN code (8-digit)
2912 29 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
phthalaldehyde
InChIKey
ZWLUXSQADUDCSB-UHFFFAOYSA-N
SMILES
C1=CC=C(C(=C1)C=O)C=O
Synonyms (37)
- OPA
- OPTA
- 1,2-BENZENEDICARBALDEHYDE
- 1,2-Benzenedicarboxaldehyde
- 1,2-Diformylbenzene
- 1,2-Phthalic dicarboxaldehyde
- 2-PHTHALALDEHYDE
- Aldehyde, ortho-Phthalic
- Benzene-1,2-dicarboxaldehyde
- Disopa
- Disopa (TN)
- O-PHTHALDIALDEHYDE [MART.]
- Orthophthaldialdehyde
- Phtalaldehydes
- Phtalaldehydes [French]
- Phthalaldialdehyde
- Phthaldialdehyde
- Phthaldialdehyde Reagent
- Phthalic aldehyde
- Phthalic dialdehyde
- Phthalic dicarboxaldehyde
- Phthalyldicarboxaldehyde
- Phtharal (JAN)
- Safe OPA
- benzene-1,2-dicarbaldehyde
- o-Phthalaldehyd
- o-Phthalaldehyde
- o-Phthalaldehyde (OPA)
- o-Phthaldehyde
- o-Phthaldialdehyde
- o-Phthalicdicarboxaldehyde
- ortho-Phthalaldehyde
- ortho-Phthalic Aldehyde
- phthalaldehyd
- phtharal
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