What is Pentaerythritol CAS 115-77-5?

Pentaerythritol CAS 115-77-5 is a tetrahydric polyol with the formula C5H12O4 and a molecular weight of about 136.15. It is also known as tetramethylolmethane or monopentaerythritol and is normally supplied as a white crystalline powder.

What is the difference between 95% and 98% Pentaerythritol?

The percentage refers mainly to monopentaerythritol content, with 98% grade offering a higher fraction of the tetraol and lower dipentaerythritol or related by-products. Both are industrial resin grades, but 98% is often preferred where more consistent hydroxyl functionality and resin performance are required.

Why is Pentaerythritol used in alkyd resin coatings?

It provides four primary hydroxyl groups per molecule, which increases branching in the resin backbone and improves hardness, gloss, drying speed, and durability. This makes it a common polyol in architectural and industrial alkyd coatings and varnishes.

How is CAS 115-77-5 used in intumescent flame-retardant systems?

Pentaerythritol acts as a carbon source or carbonific agent, often combined with ammonium polyphosphate and a blowing agent. Under heat, the system forms an insulating char layer that helps protect plastics, coatings, and other substrates.

What other industrial applications does Pentaerythritol support?

It is esterified with fatty acids to make high-stability synthetic lubricant esters, used to produce pentaerythritol tetraacrylate for UV-curable systems, and serves as a raw material for antioxidants and PVC stabilizers.

What are the key specifications of the resin grade?

Typical resin-grade specifications include monopentaerythritol content of at least 98.0%, melting point at or above 258 C, hydroxyl content around 48.0-49.5%, low moisture and ash, and a phthalic color of no more than 1 Gardner.

Pentaerythritol CAS 115-77-5

Pentaerythritol, classified as a polyhydric alcohol and often referred to as tetramethylolmethane or 2,2-bis(hydroxymethyl)1,3-propanediol, is a crystalline neopentyl structure core to modern Construction and coating chemicals. This 115-77-5 substance functions as a central polyol in the synthesis of alkyd resins and the production of high-stability esters through its four primary hydroxyl groups. Within industrial processing, monopentaerythrite and pentaerythrite are utilized for their high hydroxyl density to facilitate cross-linking in fire-retardant systems and synthetic lubricants. In intumescent designs, Ammonium Polyphosphate (APP) is a related phosphate acid-source component; the complete formulation must be qualified. We offer competitive factory pricing for customized specifications to suit varying technical grades. Every order is supported by comprehensive MSDS, TDS, COA data for reliable bulk supply management.

CAS: 115-77-5
Synonyms: Tetramethylolmethane, 2,2-Bis(hydroxymethyl)-1,3-propanediol, Monopentaerythritol, Pentaerythrite
Einecs: 204-104-9
Molecular Formula: C5H12O4
Grade: Industrial Grade (95% / 98%)
Package: 25kg/bag, 500kg/bag, or 1000kg/bag (woven bags with PE liner)

Request a quote

Share:

Product Description

Pentaerythritol CAS 115-77-5 is a tetrahydric polyol supplied as a white crystalline powder. It is available in industrial 95% and 98% monopentaerythritol grades for alkyd resins, synthetic lubricants, radiation-curing intermediates, and intumescent flame-retardant systems.

Technical Data

Property	Specification (Resin Grade)
Appearance	White crystalline powder
Monopentaerythritol Content	≥ 98.0%
Melting Point	≥ 258°C
Hydroxyl Content	48.0% – 49.5%
Moisture (Loss on drying)	≤ 0.2%
Ash Content	≤ 0.05%
Phthalic Color (Gardner)	≤ 1

Applications

Alkyd Resins: Used as the primary polyol to enhance the hardness, gloss, and drying speed of architectural and industrial coatings.
Synthetic Lubricants: Esterification with fatty acids to produce high-stability polyol esters for aviation and automotive lubricants.
Radiation Curing: Intermediate for pentaerythritol tetraacrylate (PETA) used in UV-curable inks and coatings.
Flame Retardants: Acts as a carbon source in intumescent flame retardant systems for plastics and coatings.
Plastic Additives: Raw material for the production of antioxidants and PVC stabilizers.

Storage & Safety

Storage: Store in a cool, dry, and well-ventilated warehouse. Keep away from strong oxidizers, acids, and open flames. Maintain container integrity to prevent moisture absorption.
Safety & PPE: This substance is categorized as a non-hazardous industrial chemical, but dust inhalation should be avoided. Personnel should wear chemical safety goggles, industrial protective gloves, and a NIOSH-approved dust mask during handling. Ensure adequate local exhaust ventilation in processing areas.

Quality Assurance

Our manufacturing facility implements a rigorous quality management system compliant with international standards. Each batch of Pentaerythritol undergoes comprehensive analysis via High-Performance Liquid Chromatography (HPLC) to verify monopentaerythritol content and Gas Chromatography (GC) to monitor by-product levels. We maintain strict control over particle size distribution and moisture levels, ensuring that all technical parameters align with the provided specification sheets for consistent industrial performance.

FAQ - Technical & Supply Chain

Q:
What is Pentaerythritol CAS 115-77-5?

A: Pentaerythritol CAS 115-77-5 is a tetrahydric polyol with the formula C5H12O4 and a molecular weight of about 136.15. It is also known as tetramethylolmethane or monopentaerythritol and is normally supplied as a white crystalline powder.
Q:
What is the difference between 95% and 98% Pentaerythritol?

A: The percentage refers mainly to monopentaerythritol content, with 98% grade offering a higher fraction of the tetraol and lower dipentaerythritol or related by-products. Both are industrial resin grades, but 98% is often preferred where more consistent hydroxyl functionality and resin performance are required.
Q:
Why is Pentaerythritol used in alkyd resin coatings?

A: It provides four primary hydroxyl groups per molecule, which increases branching in the resin backbone and improves hardness, gloss, drying speed, and durability. This makes it a common polyol in architectural and industrial alkyd coatings and varnishes.
Q:
How is CAS 115-77-5 used in intumescent flame-retardant systems?

A: Pentaerythritol acts as a carbon source or carbonific agent, often combined with ammonium polyphosphate and a blowing agent. Under heat, the system forms an insulating char layer that helps protect plastics, coatings, and other substrates.
Q:
What other industrial applications does Pentaerythritol support?

A: It is esterified with fatty acids to make high-stability synthetic lubricant esters, used to produce pentaerythritol tetraacrylate for UV-curable systems, and serves as a raw material for antioxidants and PVC stabilizers.
Q:
What are the key specifications of the resin grade?

A: Typical resin-grade specifications include monopentaerythritol content of at least 98.0%, melting point at or above 258 C, hydroxyl content around 48.0-49.5%, low moisture and ash, and a phthalic color of no more than 1 Gardner.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

Current Language

Change Language