Pentaerythritol (PER) Flame Retardant Grade

Name: Pentaerythritol (PER) Flame Retardant Grade
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 115-77-5

Pentaerythritol (PER) flame retardant grade is a high-purity polyol specifically used as the carbonific (carbon-forming) component of intumescent flame retardant systems for coatings, polyolefins, and thermoplastic composites. It reacts with the acid source (typically ammonium polyphosphate) upon decomposition to produce a cross-linked, thermally insulating char. High-purity FR grade PER with minimized mono-PE content is preferred for consistent char formation and coating film integrity in demanding fireproofing applications.

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Technical Specifications

appearance	White crystalline powder
moisture (%)	<0.1
ash content (%)	<0.005
melting point (°C)	258–260
di-pentaerythritol content (%)	<1.5
mono-pentaerythritol content (%)	≥98

Applications

Solvent-borne intumescent structural steel fireproofing coatings (30-year fire protection)
Waterborne intumescent wood and timber coatings for Class 1 surface spread of flame
Halogen-free intumescent FR polyolefin compounds for cables and automotive
Passive fire protection boards, batts, and blankets with charring binder
Intumescent pipe collars and cable transit fire stop systems

Key Features

High mono-PE purity (≥98%) ensures consistent char formation kinetics and coating film quality
Four hydroxyl groups per molecule deliver maximum theoretical char yield in IFR systems
Low ash content (<0.005%) prevents yellowing and discoloration of white intumescent coatings
Well-characterized reaction kinetics with APP enable precise formulation of intumescent systems