Is PEG 1500 a polymer with one exact molecular weight?

No. PEG 1500 is a mixture of polyethylene-glycol chains centered near a nominal average molecular mass of about 1,500. The number is a grade target; molecular-weight range and hydroxyl value, rather than one formula or purity percentage, define the material.

Why can PEG 1500 be supplied as a waxy solid, paste, or flake?

Physical form depends on molecular-weight distribution, melt range, temperature, and conditioning history. It should be specified and inspected under agreed conditions; a room-temperature appearance from one grade does not define every PEG 1500 material.

Which information controls a PEG 1500 heated-batch charging decision?

Match supply form, molecular-weight and hydroxyl ranges, melt range with its test method, water, and actual charging temperature. Confirm flow, melting time, and compatibility in the production equipment before transferring a formulation.

Polyethylene Glycol 1500 (PEG-1500) CAS 25322-68-3

PEG-1500 is a polyethylene glycol grade with a nominal average molecular weight of about 1,500. It is typically a water-soluble waxy solid, paste or flake depending on grade and temperature. Confirm molecular-weight range, melt range, physical form, packaging and end-use suitability against the current COA, TDS and SDS. For a higher nominal molecular-mass grade such as PEG 6000, compare melt range, physical form and handling requirements separately before selecting a specification.

CAS: 25322-68-3
Synonyms: PEG-1500; Polyethylene glycol 1500; Poly(ethylene oxide) diol; Macrogol 1500 (qualified pharmaceutical grades only)
Einecs: 500-038-2
Molecular Formula: General structure: HO–(CH₂CH₂O)ₙ–H; polymer distribution, nominal average molecular weight ≈1,500.
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

Chemical identity	Polyethylene glycol
Nominal average molecular weight	≈1,500; confirm by COA/TDS
Physical form	Waxy solid, paste, flakes or powder according to supplied grade and temperature
Melting range	Supplier specification in the current COA/TDS
Viscosity	Supplier specification at a documented temperature above the melt range

Applications

For compatible binder, processing, coating, ink and textile formulations. Pharmaceutical or personal-care use is permitted only when the supplied grade and documentation specifically support it.

For related polyethylene glycol molecular-weight grades, see PEG-300 and PEG-6000.

Storage

Keep closed, dry and protected from contamination at the temperature stated in the current TDS/SDS. Do not add an unsupported cold-storage range. Plan handling for the supplied solid, paste, flake or powder form.

Safety / Regulatory

Review the current SDS before handling. Control dust when handling flakes or powder, use the required PPE, prevent uncontrolled release and apply only grade-specific safety statements.

FAQ - Technical & Supply Chain

Q:
Is PEG 1500 a polymer with one exact molecular weight?

A: No. PEG 1500 is a mixture of polyethylene-glycol chains centered near a nominal average molecular mass of about 1,500. The number is a grade target; molecular-weight range and hydroxyl value, rather than one formula or purity percentage, define the material.
Q:
Why can PEG 1500 be supplied as a waxy solid, paste, or flake?

A: Physical form depends on molecular-weight distribution, melt range, temperature, and conditioning history. It should be specified and inspected under agreed conditions; a room-temperature appearance from one grade does not define every PEG 1500 material.
Q:
Which information controls a PEG 1500 heated-batch charging decision?

A: Match supply form, molecular-weight and hydroxyl ranges, melt range with its test method, water, and actual charging temperature. Confirm flow, melting time, and compatibility in the production equipment before transferring a formulation.

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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