Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Basic Information
- CAS Number: 626-19-7
- Molecular Formula: C?H?O?
- Molecular Weight: 134.13
- Synonyms: Isophthalaldehyde; 1,3-Benzenedialdehyde; Benzene-1,3-dicarboxaldehyde; m-Diformylbenzene; 3-Formylbenzaldehyde
- Classification: Aromatic aldehyde, organic synthesis intermediate, pharmaceutical intermediate, fluorescent whitening agent intermediate
Physical & Chemical Properties
- Appearance: White to off-white needle-like crystals or crystalline powder, odorless or with a faint aromatic odor, uniform particle size, free of visible impurities.
- Melting Point: 87–89℃ (literature value), stable at room temperature, no decomposition below 80℃, easy to agglomerate when exposed to moisture.
- Boiling Point: 136℃ (12.75 mmHg), sublimes readily under reduced pressure; decomposes at high temperature under atmospheric pressure to release carbon oxides (CO, CO?).
- Solubility: Soluble in ethanol, methanol, DMSO, hot water (≥60℃) and alkaline solutions; slightly soluble in chloroform and ethyl acetate; insoluble in ether and petroleum ether.
- Stability: Stable under normal storage conditions (cool, dry, dark); sensitive to strong oxidants and strong bases; avoid prolonged exposure to air to prevent oxidation and discoloration (turns light yellow or brown).
- Density: 1.189 g/cm3 (20℃); Flash Point: 94.1℃ (closed cup); Refractive Index: 1.4800 (estimated at 20℃); Vapor Pressure: 7.91×10?3 mmHg at 25℃.
Uses
m-Phthalaldehyde is a valuable aromatic dialdehyde intermediate with high reactivity, widely used in organic synthesis, pharmaceutical, chemical and material fields. In organic synthesis, it is a key raw material for manufacturing fluorescent whitening agents, advanced polymers, and fine chemicals. In the pharmaceutical industry, it serves as an important intermediate for the synthesis of various drugs, including anti-inflammatory, antibacterial and antiviral drugs. In polymer chemistry, it is used to prepare special resins, polyimides and high-performance composite materials due to its dual aldehyde functional groups. Additionally, it acts as a reagent in analytical chemistry for the detection of amines, amino acids and other compounds, and has applications in the production of dyes, fragrances and plastic additives.
Packaging & Storage
Packaging: Available in 1kg/5kg aluminum foil vacuum bags (light-proof and moisture-proof) for laboratory use, and 25kg cardboard drums lined with double-layer food-grade plastic bags for industrial bulk orders. All packages are clearly labeled with product name, CAS number, purity, molecular formula, net weight, production date, shelf life and storage requirements. Storage: Store in a cool, dry, well-ventilated warehouse at 2-8℃, away from light, moisture, high temperature and open flames. Keep tightly sealed under inert gas (argon or nitrogen) to prevent air exposure, oxidation and discoloration. Avoid storing with strong oxidants and strong bases, and keep away from incompatible substances (such as reducing agents, acids). Shelf life is 12 months under proper storage; do not use beyond expiration. Avoid violent collision during transportation to prevent package damage.
