o-Phthalaldehyde (OPA) | CAS 643-79-8

Chemical Name: o-Phthalaldehyde
CAS Number: 643-79-8
Synonyms: OPA, 1,2-Benzenedicarboxaldehyde
Category: Aromatic Aldehyde / Chemical Intermediate

Product Overview

o-Phthalaldehyde (OPA, CAS 643-79-8) is a highly reactive aromatic dialdehyde compound.  Its molecular structure contains two adjacent aldehyde groups, giving it excellent derivatization capabilities and reaction selectivity in chemical reactions.

OPA is widely used in medical disinfectants, biochemical analysis reagents, fluorescence detection, and as an intermediate in pharmaceuticals and fine chemicals.  It plays an irreplaceable role in amino acid and protein detection and is an important functional raw material in analytical chemistry and the medical disinfection industry.

Technical Data Sheet

Typical Application Areas (Industrial Applications)

1. Medical Disinfection and Sterilization

High-level disinfectants for endoscopes and medical devices

Glutaraldehyde substitute disinfectant raw materials

2. Biochemical and Analytical Reagents

Fluorescent derivatization reagents for amino acids and proteins

HPLC and laboratory analytical reagents

3. Pharmaceuticals and Fine Chemicals

Pharmaceutical intermediates

Synthesis of fine chemicals

4. Scientific Research and Laboratory Applications

Biochemical research

Quantitative analysis and detection

Key Performance Highlights

✔ Dual aldehyde structure, high reactivity

✔ High fluorescence derivatization efficiency, high detection sensitivity

✔ High purity, strict impurity control

✔ Mature for medical and analytical applications

✔ Suitable for high-end scientific research and industrial systems

Supply and Service Advantages:

🔹 Stable raw material sources and mature production processes

🔹 Strict quality control and strong batch consistency

🔹 Supports analytical and industrial grade specifications

🔹 Provides COA / MSDS / TDS

🔹 Familiar with export requirements for medical and laboratory products

Packaging & Storage

• Packaging:

• 1 kg / 5 kg Aluminum Foil Bag

• 25 kg Fiber Drum

• Storage Conditions:

• Store in a cool, dry place

• Protect from light and moisture

• Shelf Life: 24 months

FAQ – Frequently Asked Questions 

Q1: What is o-Phthalaldehyde mainly used for?
A: It is mainly used in medical disinfectants and biochemical analytical reagents.

Q2: Is OPA suitable for laboratory analysis?
A: Yes, OPA is widely used as a derivatization reagent in analytical chemistry.

Q3: Can you supply high-purity grade?
A: Yes, purity ≥99% is standard, higher grades are available upon request.

Q4: Do you offer samples?
A: Yes, samples are available for evaluation.

Q5: What documentation is provided?
A: COA, MSDS, and TDS are available.