Why is PPG-2000 not specified by a single purity percentage?

PPG-2000 is a polypropylene-glycol distribution centered near 2,000 average molar mass, not one discrete molecule. Commercial quality is therefore controlled by molecular-weight-related properties, hydroxyl value, viscosity, water, acidity and application performance.

Which PPG-2000 properties matter most in resin or lubricant processing?

Viscosity at a stated temperature affects transfer and blending, while hydroxyl value reflects average functionality and reactivity. Water, acidity, color and appearance may also influence reaction consistency, lubricant stability and finished-product quality.

Should PPG-2000 be assumed to dissolve completely in water?

No. Water compatibility varies with molecular-weight distribution, concentration, temperature and other ingredients. Test the offered grade in the buyer’s actual aqueous system and process window rather than relying on a general solubility statement.

What should a buyer provide when replacing a PPG-2000 grade?

Send the reference COA, application, viscosity temperature and range, hydroxyl value, water and acidity limits, trial quantity, destination and package. Qualification should compare handling, compatibility, process behavior and finished-product performance.

Polypropylene Glycol 2000 (PPG-2000) CAS 25322-69-4

Polypropylene Glycol 2000 (PPG-2000; CAS 25322-69-4, EC 500-039-8) is a propylene-oxide-based polyether glycol with an average molar mass around 2,000. As a polymeric material, it is defined by a molecular-weight distribution and hydroxyl functionality rather than one fixed molecular formula or a single-substance purity assay. It is used as a lubricant base, antifoam component, plasticizer or resin intermediate and in other industrial formulations. For a lower nominal molecular weight in the same PPG series, PPG-200 is a related grade; selection should follow the agreed viscosity and hydroxyl-value range. Buyers should match viscosity, hydroxyl value, water, acidity, appearance and application performance, then confirm the current TDS, SDS and batch COA.

CAS: 25322-69-4
Synonyms: PPG-2000; Polypropylene glycol 2000; Poly(propylene glycol); Polyoxypropylene glycol; Polyether glycol
Einecs: 500-039-8
Molecular Formula: Propylene-oxide-based polymer; repeat unit (C3H6O)n with hydroxyl end groups; average molar mass approximately 2,000; no single fixed molecular formula.
Grade: Confirm the commercial grade code, average molecular mass or composition distribution, hydroxyl or viscosity data, water and physical form against the current TDS and COA.
Package: State required quantity, physical form and destination; confirm the current bag or container, liner, net weight, temperature handling and transport requirements before quotation.

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Product Description

1 Parameters

2 Applications

3 Storage

4 Safety / Regulatory

Parameters

Identity	Propylene-oxide-based polyether glycol polymer; CAS 25322-69-4; average molar mass about 2,000; no single fixed molecular formula.
Specification basis	Commercial PPG-2000 polymer grade. Use the current TDS and batch COA; do not present a single-compound purity percentage.
Key parameters	Viscosity at the stated temperature, hydroxyl value, water, acidity, color and appearance. Hydroxyl value about 54–58 mg KOH/g is a typical grade range and must be controlled or confirmed by the supplier specification and batch COA.
Application test	Validate compatibility, dosage, foaming or lubrication behavior and finished-formulation stability under the buyer’s actual process conditions.

Applications

Lubricant and functional-fluid base stocks.
Antifoam and foam-control formulations.
Plasticizing and processing-aid functions.
Resin, polyurethane or other polymer intermediates, subject to formulation validation.

Storage

Store tightly closed in the original container in a cool, dry, well-ventilated place, protected from moisture, contamination, heat and incompatible materials. Follow the supplier SDS and stated shelf-life conditions.

Safety / Regulatory

For industrial use. Review the current supplier SDS before handling; use suitable gloves and eye protection, provide ventilation, avoid contact and spills, and follow applicable transport, disposal and workplace rules.

FAQ - Technical & Supply Chain

Q:
Why is PPG-2000 not specified by a single purity percentage?

A: PPG-2000 is a polypropylene-glycol distribution centered near 2,000 average molar mass, not one discrete molecule. Commercial quality is therefore controlled by molecular-weight-related properties, hydroxyl value, viscosity, water, acidity and application performance.
Q:
Which PPG-2000 properties matter most in resin or lubricant processing?

A: Viscosity at a stated temperature affects transfer and blending, while hydroxyl value reflects average functionality and reactivity. Water, acidity, color and appearance may also influence reaction consistency, lubricant stability and finished-product quality.
Q:
Should PPG-2000 be assumed to dissolve completely in water?

A: No. Water compatibility varies with molecular-weight distribution, concentration, temperature and other ingredients. Test the offered grade in the buyer’s actual aqueous system and process window rather than relying on a general solubility statement.
Q:
What should a buyer provide when replacing a PPG-2000 grade?

A: Send the reference COA, application, viscosity temperature and range, hydroxyl value, water and acidity limits, trial quantity, destination and package. Qualification should compare handling, compatibility, process behavior and finished-product performance.

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.

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