Chinese Name: Hydroxymethyl phenylphosphinic acid
English Name: Hydroxymethyl phenylphosphinic acid
Abbreviation: HMPPA
CAS Number: 61451-78-3
Molecular Formula: C7H9O3P
Molecular Weight: 172.1
Main Quality Indicators:                 
Appearance: White powder or crystals
Purity (HPLC): ≥99.0%
Melting Point: 137-139℃
Phosphorus Content: 18.0±0.5%
Acid Value: 326±4mgKOH/g
Iron Content: ≤0.005%
Chlorides: ≤0.01%
Moisture: ≤0.5%
Packaging: 25kg cardboard drum or woven bag lined with plastic bag (or as per customer requirements)
Properties: Easily soluble in water, stable at room temperature
Applications: This product is an environmentally friendly flame retardant. It is a new generation of permanent flame-retardant modified products developed based on the structural characteristics of polyester. Compared to CEPPA, it features higher phosphorus content, relatively lower addition amount, and better thermal stability. The flame-retardant chips produced with it have a higher melting point (up to 256℃) than those produced with CEPPA, resulting in less floating filaments and breakage during spinning, enabling the production of finer polyester products. It is widely used in flame-retardant textiles, flame-retardant yarns, flame-retardant chemical fibers, and various flame-retardant applications for clothing and decorative fabrics.

Structural Formula: