Identity gate
Confirm chemical name and CAS. Keep olefin propylene (115-07-1) off a glycol RFQ unless that monomer is the actual item. Record intended application in buyer words.
Specification Brief
Propylene glycol suppliers questions to close before inquiry
This brief is a gate, not a catalog. Use it to decide which concentration, purity, moisture, packaging and document questions must be answered before propylene glycol suppliers receive a comparable RFQ. It does not approve a mill, certify a lot or replace laboratory or EHS review. Sustainability, carbon or ESG language is not part of this page.
Gates that keep a supplier set comparable
Mark each gate accepted, open or not applicable. A proposed substitute grade, inhibitor or pack size starts a new row so the original request stays auditable. Align currency, quantity unit, net contents, Incoterm and freight inclusions before any unit-price comparison. This brief never states a percent saving versus an unnamed market.
Assay gate
List concentration, purity, moisture, density, viscosity and flash point if known. Mark unknowns for supplier confirmation. Typical TDS values are not lot limits.
Package gate
Lock drum, IBC or isotank, net content, palletization, labeling and any site unloading limit. Transport classification waits for the exact SDS.
Evidence gate
Request current SDS, TDS and CoA format for the quoted product. Ask TSCA, REACH, GMP or ISO status only as verification questions, not as this desk’s credentials.
| Field | Buyer basis | Quoted answer | Status |
|---|---|---|---|
| Concentration | Buyer to specify | Supplier to confirm | Open / accepted |
| Purity / assay | Buyer to specify | Supplier to confirm | Open / accepted |
| Moisture | Buyer to specify | Supplier to confirm | Open / accepted |
| Packaging | Buyer to specify | Supplier to confirm | Open / accepted |
| UN number | Buyer to specify | Supplier to confirm | Open / accepted |
Approval questions that stay with the buyer
Who signs the specification?
Name the technical buyer or formulator who can accept an alternative concentration. This desk does not approve substitutions.
Who reviews the SDS?
EHS review of storage, labeling and transport stays with qualified staff. This page is not an operating procedure.
What is the sample for?
Define identity, appearance, assay, viscosity or compatibility. Record method and pass/fail outside the quotation itself.
Limits: unknown inventory; no implied ISO badge; no mixing recipe; optional budget is planning only. Public family references such as SpecialChem product-family pages frame questions only.
Send the closed gates with the still-open fields
Send the locked assay, pack type, quantity and US destination together with any SDS, TDS or CoA cells still open. Factory answers can be compared only after those cells return on the same grid.