Dipentaerythritol (DiPER) High-Char Flame Retardant

Name: Dipentaerythritol (DiPER) High-Char Flame Retardant
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 126-58-9

Featured inFlame Retardants

Dipentaerythritol (DiPER) is a hexafunctional polyol carbon source used in intumescent flame retardant systems where higher char yields and improved char stability versus mono-pentaerythritol are required. The additional hydroxyl groups and higher molecular weight of DiPER produce a more cross-linked, mechanically robust char that better resists slumping and cracking under fire conditions. DiPER is preferred in high-specification structural steel coatings requiring extended fire resistance periods (90–120 minutes) and thick-film intumescent systems.

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Technical Specifications

appearance	White crystalline powder
moisture (%)	<0.2
ash content (%)	<0.01
melting point (°C)	215–222
hydroxyl value (mgKOH/g)	1090–1120
dipentaerythritol content (%)	≥96

Applications

High-specification structural steel coatings requiring 90–120 min fire resistance rating
Thick-film intumescent coatings for offshore and petrochemical plant protection
Cellulosic and hydrocarbon fire curve intumescent coatings for critical structures
High-char polyolefin intumescent FR compounds for heavy-duty cable management
Intumescent sealants and fire collars for large-diameter pipeline penetrations

Key Features

Six hydroxyl groups per molecule produce higher char cross-link density and mechanical char stability than PER
Improved char cohesion at high temperatures prevents crack-induced flame penetration in extended fire tests
Lower water solubility than PER improves weathering resistance of outdoor intumescent coatings
Compatible with all standard IFR systems (APP/MEL) as a high-performance PER upgrade