Is PETS the same as a generic pentaerythritol stearate or pentaerythritol tristearate?

No. PETS normally refers to pentaerythritol tetrastearate, CAS 115-83-3. A generic pentaerythritol stearate or a tristearate can have a different ester composition, hydroxyl value and melting behaviour. The abbreviation on a label is not enough to establish equivalence; the offered composition and test data must be compared.

Why must physical form and melting behaviour be specified for PETS?

PETS may be supplied as powder, flake or another waxy solid form. Particle form and melting or dropping behaviour can affect feeding, dispersion and processing response. These properties should be agreed with the polymer system and processing equipment rather than inferred from the CAS number or the PETS abbreviation.

Which trial observations determine whether a PETS grade fits a polymer process?

Evaluate the offered grade in the actual compound and processing route. Compare feed consistency, melt flow or torque, release, plate-out, surface appearance and the required finished-part properties against the approved reference. Acceptance should combine the agreed analytical limits with the relevant processing and finished-product results.

Pentaerythritol Tetrastearate (PETS) CAS 115-83-3

Pentaerythritol Tetrastearate (PETS, CAS 115-83-3, EC 204-110-1) is a waxy polyol ester used as a lubricant, mold-release aid and processing additive in polymer and rubber systems. The ideal tetrastearate component has the formula C77H148O8, while supplier grades can differ in related fatty-acid esters, residual acidity, hydroxyl value, melting behavior, color and physical form. Confirm composition, specification, supply form and packaging against the current TDS, COA and SDS before evaluating the material in the intended process.

CAS: 115-83-3
Synonyms: Pentaerythritol Tetrastearate; Pentaerythrityl Tetrastearate; PETS; Stearic Acid Pentaerythritol Tetraester
Einecs: 204-110-1
Molecular Formula: C77H148O8 for the ideal tetrastearate component; confirm commercial composition
Grade: Confirm acid value, ester or saponification value, hydroxyl value, melting range, color and physical form
Package: Confirm current packaging for the selected specification and destination

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Product Description

1 Product Overview

2 Product Information / Specifications

3 Storage, Safety and Documentation

Product Overview

Pentaerythritol Tetrastearate (PETS, CAS 115-83-3, EC 204-110-1) is a waxy long-chain fatty-acid ester used as an internal or external lubricant, mold-release aid and processing additive in thermoplastics, engineering plastics, rubber compounds and coatings. PETS is the established industry abbreviation for this product. Commercial grades may contain palmitate or other C16–C18 ester components, so ester value, acid value, hydroxyl value, melting or dropping range, color, form and packaging should be confirmed for the supplied grade. COA, TDS and SDS may be provided on request.

Product Information / Specifications

Product	Pentaerythritol Tetrastearate (PETS) CAS 115-83-3
CAS No.	115-83-3
EC No.	204-110-1
Molecular Formula / Identity	C77H148O8 (reference component; commercial grades may contain C16–C18 fatty-acid ester components)
Synonyms	Pentaerythritol tetrastearate, Pentaerythrityl tetrastearate, PETS, Stearic acid pentaerythritol tetraester
Grade / Supply Specification	Confirm acid value, ester or saponification value, hydroxyl value, melting range, color and physical form
Packaging	Confirm current packaging for the selected specification and destination

Storage, Safety and Documentation

Store and handle the product in accordance with the current supplier TDS and SDS. Confirm the applicable COA, specification, packaging and destination-market requirements before purchase or use.

FAQ - Technical & Supply Chain

Q:
Is PETS the same as a generic pentaerythritol stearate or pentaerythritol tristearate?

A: No. PETS normally refers to pentaerythritol tetrastearate, CAS 115-83-3. A generic pentaerythritol stearate or a tristearate can have a different ester composition, hydroxyl value and melting behaviour. The abbreviation on a label is not enough to establish equivalence; the offered composition and test data must be compared.
Q:
Why must physical form and melting behaviour be specified for PETS?

A: PETS may be supplied as powder, flake or another waxy solid form. Particle form and melting or dropping behaviour can affect feeding, dispersion and processing response. These properties should be agreed with the polymer system and processing equipment rather than inferred from the CAS number or the PETS abbreviation.
Q:
Which trial observations determine whether a PETS grade fits a polymer process?

A: Evaluate the offered grade in the actual compound and processing route. Compare feed consistency, melt flow or torque, release, plate-out, surface appearance and the required finished-part properties against the approved reference. Acceptance should combine the agreed analytical limits with the relevant processing and finished-product results.

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