PIA CAS 121-91-5

PIA CAS 121-91-5

Shanshan resources group is a Top 100 service enterprises Of Ningbo China(Rank 6th), we are a professional manufacturer and global distributor of chemical products, which passed CQC certification. Our mother company Shanshan Enterprise, has been listed in China's top 500 enterprises for 20 consecutive years since 2002, and ranks 373rd with a sales volume of 53.1 billion yuan in 2021. PIA CAS 121-91-5, is a versatile organic compound, belonging to the family of phthalic acids. With the chemical formula C8H6O4, it plays a pivotal role in various industrial applications.

Product Details

Property Description
Chemical Name PIA CAS 121-91-5
Aliases 1,3-Benzenedicarboxylic Acid; m-Phthalic Acid
CAS Number 121-91-5
Physical State Solid
Appearance Colorless Crystals
Chemical Formula C8H6O4
Molecular Weight ~166.13 g/mol
Melting Point 238-240 °C (460-464 °F)
Solubility Sparingly soluble in water; soluble in organic solvents (e.g., acetone, dichloromethane)
Density ~1.49 g/cm³
Odor Odorless
Purity >99%
Stability Stable under normal storage conditions


PIA CAS 121-91-5 is an organic compound with the formula C6H4(CO2H)2. This colourless solid is an isomer of phthalic acid and terephthalic acid. These aromatic dicarboxylic acids are used as precursors (in form of acyl chlorides) to commercially important polymers, e.g. the fire-resistant material Nomex. Mixed with terephthalic acid, iso phthalic acid is used in the production of resins for drink bottles. The high-performance polymer poly benzimidazole is produced from iso phthalic acid.

Packing and shipment

Our PIA CAS 121-91-5 is available in 25kg/500 bags, 1ton FCB. We prioritize secure packaging to ensure the product's integrity during transportation. Shipping is handled with care, adhering to safety regulations to guarantee the product reaches you in optimal condition.


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