Dipentaerythritol, DiPE, 126-58-9

DIPENTAERYTHRITOL (DiPE)

1. PRODUCT IDENTIFICATION AND CHEMICAL IDENTITY

Short Identity Section

Detailed Identification

Description:
Dipentaerythritol (DiPE) is a high-value-added, polyfunctional polyol among pentaerythritol derivatives. With its structure containing six hydroxyl groups, it is an important intermediate in resins, coatings, and flame retardant systems. It is widely used in UV-curable coatings, alkyd resins, polyurethanes, polyesters, synthetic lubricants, and photosensitive resin systems. Its micronized form provides easy dispersion in formulations and is preferred in high-performance applications. It acts as a carbon source in intumescent fire-retardant coating systems, contributing to the formation of a protective carbon layer.

2. PHYSICAL AND CHEMICAL PROPERTIES

Note: Values are typical and may vary by source and production batch.

3. SOLUBILITY PROFILE

Note: DiPE is partially soluble in water.

4. CHEMICAL PROPERTIES AND REACTIONS

Incompatibilities

• Strong oxidizing agents

• Strong acids (esterification)

Chemical Reactions

• Esterification: Reacts with organic acids to form esters (resin synthesis).

• Intumescent Char Formation: At high temperatures, reacts with phosphoric acid derivatives to form a dense and stable carbon barrier.

5. SPECIFICATIONS

Packaging Options

6. APPLICATIONS AND INDUSTRIAL USES

6.1 Primary Application Areas

6.2 Function in Intumescent Systems

Dipentaerythritol acts as a char-forming agent in intumescent flame retardant systems. It is generally used together with:

• Ammonium Polyphosphate (APP)

• Melamine

• Melamine Phosphate

• Melamine Pyrophosphate

• Phosphorus-based flame retardants

At high temperatures, it reacts with phosphoric acid derivatives to form a dense and stable carbon barrier. This barrier slows the spread of fire by blocking oxygen and heat transfer. Dipentaerythritol can provide higher char formation efficiency than standard pentaerythritol and is particularly preferred in high-performance intumescent coating systems.

6.3 Key Advantages

• High purity.

• High hydroxyl functionality.

• Superior char formation performance.

• Good thermal stability.

• Low ash content.

• Easy processability.

• High adhesion strength.

• Excellent abrasion resistance.

• Good aging resistance.

• Compatibility with halogen-free systems.

6.4 Recommended Usage

The usage ratio varies depending on the application type, resin system, and targeted performance criteria. In intumescent systems, it is generally used together with APP and melamine-based flame retardants to achieve optimum fire resistance. Exact usage amounts should be determined through laboratory and pilot production studies.

7. BIOLOGICAL AND STRUCTURAL PROPERTIES

Note: This product is an industrial chemical intermediate. It is not intended for biological, pharmaceutical (except as an intermediate), or food applications.

8. BIOCHEMICAL APPLICATIONS

Note: Not applicable for this industrial chemical intermediate.

9. SAFETY AND TOXICOLOGY

9.1 Acute Toxicity

9.2 Chronic Toxicity

9.3 GHS Classification

Note: Classification is based on ECHA and multiple manufacturer SDSs (Merck, Sigma-Aldrich, Fisher Scientific). The substance is not classified as dangerous according to Regulation (EC) No 1272/2008.

9.4 Precautionary Statements

9.5 Safety Precautions and PPE

Hazards:

• Not classified as hazardous according to GHS.

• Dust may cause respiratory irritation.

PPE (recommended):

• Safety goggles

• Chemical-resistant gloves

• Dust mask

• Protective work clothing

9.6 Environmental Fate

10. TRANSPORT INFORMATION

Note: Dipentaerythritol is not regulated as dangerous goods for transport.

11. REGULATORY INFORMATION

Note: Dipentaerythritol is registered under REACH with EC number 204-794-1.

12. STORAGE AND HANDLING

13. FIREFIGHTING MEASURES

14. ACCIDENTAL RELEASE MEASURES

15. FIRST AID MEASURES

16. RAW MATERIALS AND DOWNSTREAM PRODUCTS

16.1 Raw Materials (Upstream)

16.2 Downstream Products

17. SECTORAL SUITABILITY AND USAGE LEVELS

18. CARBON DIOXIDE ABSORPTION AND REAGENTS

Not applicable. Dipentaerythritol is an industrial chemical intermediate and is not used for CO₂ absorption or as a chemical reagent.

19. DERIVATIVES AND RELATED COMPOUNDS

Note: Dipentaerythritol provides higher char formation efficiency than pentaerythritol in intumescent systems.

20. SUMMARY AND CRITICAL WARNINGS

SUMMARY

Dipentaerythritol (DiPE) is a high-value-added, polyfunctional polyol among pentaerythritol derivatives. With its structure containing six hydroxyl groups, it is an important intermediate in resins, coatings, and flame retardant systems. It is widely used in UV-curable coatings, alkyd resins, polyurethanes, polyesters, synthetic lubricants, and photosensitive resin systems. Its micronized form provides easy dispersion in formulations and is preferred in high-performance applications. It acts as a carbon source in intumescent fire-retardant coating systems, contributing to the formation of a protective carbon layer.

The chemical name is 2,2,2',2'-Tetrakis(hydroxymethyl)-3,3'-oxydipropan-1-ol, with CAS number 126-58-9 and EC number 204-794-1. It appears as a white crystalline powder with a melting point of ≥215 °C.

Key Properties

Main Application Areas

Key Safety Points

• NOT HAZARDOUS: Not classified as a hazardous substance or mixture according to GHS.

• LOW ACUTE TOXICITY: Oral LD₅₀ (rat) > 2,000 mg/kg.

• DUST HAZARD: Dust/air mixtures may be explosive.

• PPE REQUIRED: Use safety goggles, chemical-resistant gloves, dust mask, and protective work clothing.

• STORAGE: Store in a dry and well-ventilated area, away from moisture and strong oxidizing agents. Keep containers tightly closed.

• DISPOSAL: Dispose of according to local regulations.

Critical Warnings

• Dipentaerythritol is not classified as hazardous according to GHS, but dust may cause respiratory irritation.

• Dust/air mixtures may be explosive.

• This TDS contains completed toxicological, transport, firefighting, and first aid data, but always refer to the supplier's official SDS/MSDS.

• Do not use this TDS as a substitute for the official SDS/MSDS.

• Users are responsible for determining the suitability of the product for their specific applications and for complying with all applicable regulations and safety requirements.

Disclaimer:
This Technical Data Sheet (TDS) is for informational purposes only. The information provided is based on the original source document, verified CAS/EC numbers, and data completed from reliable sources (ECHA, manufacturer SDSs). However, the user is solely responsible for determining the suitability of the product for their specific applications and for complying with all applicable regulations and safety requirements. For complete safety, handling, storage, and regulatory compliance information, always refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. Users are responsible for testing the product in their own processes and applications. All local, national, and international regulations must be followed when working with Dipentaerythritol (DiPE).