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    Related: PPG 2000 CAS 25322-69-4 PPG-1000
    • PPG 2000 (Polyether Polyol 220-Type) CAS 25322-69-4

    PPG 2000 (Polyether Polyol 220-Type) CAS 25322-69-4

    PPG 2000 (CAS 25322-69-4), also called polypropylene glycol 2000 or polyoxypropylene glycol, is a polyether polyol with a nominal average molecular weight near 2,000. It is used in polyurethane production, lubricant and defoaming formulations, and as a chemical intermediate. Hydroxyl value, hydroxyl functionality, viscosity, water content, acid value and color guide grade selection for the intended application. COA, TDS and SDS are available for specification and handling information.

    • CAS: 25322-69-4
    • Synonyms: Polypropylene glycol 2000; PPG 2000; Polyoxypropylene glycol 2000; Poly(propylene oxide) diol (nominal 2000)
    • Molecular Formula: Hydroxyl-terminated polyether with varying chain length; propyleneoxy repeat unit C₃H₆O. No single fixed molecular formula.
    • Grade: Industrial polyether polyol; grade specifications include hydroxyl value, hydroxyl functionality, viscosity, water content, acid value and color.
    • Package: Drum or bulk packaging; container type and net weight are specified in the quotation.
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    Product Description

    1 Identity and quality controls
    2 Applications and reactive grade selection
    3 Technical documents and analytical reports
    4 Related grades and formulation components
    5 Storage, handling and bulk quotations

    Identity and quality controls

    ItemGrade information and reporting basis
    Product identityPolypropylene glycol 2000, a polyoxypropylene polyol grade. Polyether Polyol 220-Type is a commercial designation; grade matching depends on its specification.
    CAS / EC referenceCAS 25322-69-4; EC / NLP 500-039-8 is a PPG family reference, not a grade specification or certification.
    Average molar massNominal average near 2,000 g/mol, with a distribution of chain lengths. An average calculated from hydroxyl value does not measure the full distribution.
    Hydroxyl functionalityNominal diol functionality 2 for this PPG grade family; the specified average hydroxyl functionality and end-group profile distinguish reactive grades.
    Hydroxyl valueReported in mg KOH/g with the grade range and applicable polyol test method.
    Water contentReported as mass fraction, such as wt% or mg/kg, using a suitable Karl Fischer method.
    ViscosityInclude test temperature, method and unit. Dynamic viscosity uses mPa·s (cP); kinematic viscosity uses mm²/s (cSt).
    Acid valueReported separately in mg KOH/g with the agreed grade limit and method; acid value is not pH.
    Appearance and colorTypically a clear, colorless to pale liquid. The grade specification states appearance and color limits with the test basis.

    Applications and reactive grade selection

    PPG 2000 is used in suitable grades for polyurethane prepolymers, adhesives, coatings and elastomers, and in lubricant and foam-control formulations. In polyurethane calculations, hydroxyl value determines the polyol hydroxyl equivalents, while hydroxyl functionality influences chain architecture and network formation. Water and other active-hydrogen ingredients are accounted for separately, together with the isocyanate NCO content and target index. Formulation performance depends on the selected grade and processing conditions.

    Technical documents and analytical reports

    The Certificate of Analysis (COA), Technical Data Sheet (TDS) and Safety Data Sheet (SDS) are available for the quoted grade. The TDS gives grade specifications and test conditions, the COA records reported batch results, and the SDS covers safe handling. For molecular-mass-distribution requirements, SEC/GPC reports can be provided with number-average molar mass (Mn), weight-average molar mass (Mw), dispersity, calibration basis and method conditions.

    Residual propylene oxide test reports can also be provided when required. Targeted headspace GC methods suit free propylene oxide analysis in polyethers, with sample preparation and calibration appropriate to the PPG matrix. Reports state the analyte, result in mg/kg, method and detection or quantification limit. A residual-monomer result does not establish one GC purity percentage for the complete polymer distribution.

    Related grades and formulation components

    PPG-1000 and PPG-200 provide comparisons with shorter-chain polyether diol grades. Their hydroxyl equivalents, viscosity and formulation behavior differ from PPG 2000; a shared CAS number does not establish equal dosage or interchangeability.

    For polyurethane formulations, polymeric MDI (PMDI) is a possible isocyanate co-component. Its grade, NCO content and functionality are selected for the polyol hydroxyl equivalents, water content, target index and cure conditions. This relationship does not define a universal mixing ratio.

    In industrial lubricant and foam-control formulations, BPE-1500 butanol-initiated EO/PO polyether provides a different polyether architecture for comparison. Its initiator, EO/PO composition and hydroxyl functionality differ from a PPG diol, so it is not a direct reactive replacement; compatibility and performance are evaluated in the intended formulation.

    Storage, handling and bulk quotations

    Keep containers tightly closed and dry to limit moisture pickup and contamination. Follow the supplied grade TDS/SDS for storage temperature, incompatible materials, protective equipment, spill response and disposal.

    For a bulk quotation, send the PPG 2000 grade or application, quantity and destination. A reference specification and any hydroxyl-value, viscosity or water requirements help match the grade. Packaging and essential analytical requirements are included in the offer.

    FAQ - Technical & Supply Chain

    • Q:

      Does Polyether Polyol 220 identify one universal PPG 2000 specification?

      A: No. “220” is a commercial grade designation, not a universal definition of molecular-weight distribution, hydroxyl functionality or reactivity. For polyurethane use, compare the quoted grade’s hydroxyl value, functionality, viscosity, water and acid value with the intended reference specification.
    • Q:

      Why are CAS number and nominal molecular weight insufficient for selecting PPG 2000?

      A: PPG 2000 contains a distribution of polymer chain lengths. Hydroxyl value gives the hydroxyl equivalents used in isocyanate calculations; hydroxyl functionality influences chain architecture and network formation. Water and other active-hydrogen ingredients are accounted for separately. Viscosity, acid value and the grade specification also affect selection and processing.

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