Polypropylene (PP) resin, CAS 9003-07-0 with repeat unit (C3H6)n, is sold through a two-tier market: a small set of named chemical-trading houses (e.g., InterBusinessGroup, Omsk, listed on ChemNet [S1]) and high-volume B2B directories (Made-in-China.com, ChemicalBook, Okorder, Alibaba) that surface hundreds of factory entries [S2][S3][S5][S6].
The polymer sits in the Polymers / Synthetic Resin and Plastics category, with synonyms "Propylene Resin (Low M.Wt.)" and "PP" [S1]; downstream forms include non-woven geotextile fabric at US$0.77-0.80/m² [S2], PP staple fiber at 30,000 t/month supply capability with a 2 t MOQ [S7], and PP rope at US$5.68/m with a 50 m MOQ from Guangdong suppliers [S8].
CAS, Chemistry, and Grade Vocabulary Buyers Must Match
PP homopolymer and random copolymer grades are catalogued under CAS 9003-07-0 and molecular formula (C3H6)n on ChemNet's Russia supplier page, where the listing shows "Propylene Resin (Low M.Wt.)" as an explicit synonym [S1]. Buyers should treat CAS 9003-07-0 as the universal cross-check when comparing offers on Made-in-China, ChemicalBook, and Alibaba, since directory listings often omit the CAS and only display a Chinese trade name or a fiber-grade designation [S2][S5].
Melt flow rate (MFR, g/10 min, 230°C/2.16 kg) is the operating sorting key across raffia, injection, fiber, and extrusion grades; PP staple fiber specifically uses a "synthetic fiber made from polypropylene resin" feedstock and is sold with attributes "lightweight, high strength, and excellent chemical resistance" [S7]. For downstream converters specifying container or liner applications, the Made-in-China "Polypropylene Inside" square-container-bag category (page 4 of the product list) is the directory's most consistent index for film-grade PP [S2].
For a wider polymer-grade context, see the synthetic resin encyclopedia entry, which maps PP, PE, PVC, and PET against melt-flow and density.
Regional Supplier Density: Russia, China, and the Trading-Company Layer
Russian-Federation PP supply concentrates around Omsk-based trading house InterBusinessGroup on ChemNet (supplier ID 43623, CAS 9003-07-0) — a typical "one-entity-per-region" pattern for an import-dependent market [S1]. China, by contrast, shows the directory-density pattern: Made-in-China returns 1 verified factory in Guangxi for PP plastic resin with OEM/ODM capability (New Yuda Environmental Protection Technology Co., Ltd., Gold Member) [S3], while the PP-fiber query against Shandong suppliers surfaces chemical-additive makers (e.g., concrete admixtures, superplasticizer, retarder) holding ISO 9001:2015 certification [S4].
ChemicalBook's "Polypropylene resin, special" supplier page (entry CB52088292) functions as a low-volume specialty index, with no EINECS, molecular weight, or Mol File populated [S5] — a buyer red flag indicating the listing is a sales-broker entry rather than a polymer producer. Okorder's PP staple fiber listing further quantifies the China fiber-grade supply: 3,000,000 t/month group supply capability against a 2 t MOQ, port of loading "China main port", payment terms TT or LC [S7].
Cross-reference the PVC resin supply 2026 SG3-SG8 sourcing map — the same Chinese directory pattern (made-in-china / okorder / alibaba) applies to PP sourcing.
Quality Signals: ISO 9001:2015, Gold Member Tiers, and RFQ Filters
ISO 9001:2015 certification is the baseline discriminator on Made-in-China; the Shandong Jinan PP-fiber factory (chemical additives, concrete admixtures, superplasticizer, retarder) is one verified holder, with "Mgmt. Certification: ISO9001:2015" rendered as a structured directory field [S4]. New Yuda Environmental Protection Technology in Guangxi is flagged as "Gold Member" with business type "Manufacturer/Factory & Trading Company", meaning the listing blends direct production and trading [S3] — useful when a buyer wants both resin supply and wastewater-treatment skid integration.
Made-in-China's SGS filter and Secured Trading Service are the directory's two commercial-risk dials; the page-4 Polypropylene Inside result set includes "SGS" and "Audited Factory" as filter chips that buyers can stack on top of the CAS check [S2]. Alibaba's PP-plastic manufacturer showroom functions as a wide-net secondary index for buyers who have already cleared the CAS and want a price-floor cross-check [S6].
MOQ, Pricing, and Lead-Time Bands by Product Form
MOQ compression is the single biggest variable across PP product forms. PP staple fiber (Okorder) sets MOQ at 2 metric tons against a 3,000,000 t/month group supply capability [S7]; PP rope (Made-in-China, Zhongshan Guangdong) sets MOQ at 50 m at US$5.68/m against 8 manufacturers and 24 products indexed [S8]; PP non-woven geotextile fabric lists at US$0.77-0.80 over a 2,000 m² MOQ window [S2]. These three product-form anchors let a converter size a single RFQ across film, fiber, and rope grades from a single Made-in-China / Okorder RFQ basket [S2][S7][S8].
Payment terms cluster on the standard Chinese-export triad: TT (telegraphic transfer) and LC (letter of credit) for Okorder staple fiber [S7], and RMB/USD bank transfer for Made-in-China verified-supplier transactions; the Made-in-China "Secured Trading Service" layer adds escrow protection for buyers who cannot pre-audit the factory [S2].
For peer benchmarks on resin price-spread volatility, see the PE resin shortage 2026 sourcing-risk brief — PP and PE share the same propylene/ethylene cracker exposure on the upstream side.
Selection Criteria: Matching Supplier Type to Application
A four-criteria comparison clarifies which channel fits which buy: (1) Material certification depth — ISO 9001:2015 verified (Shandong PP-fiber factory) [S4] vs unverified specialty broker (ChemicalBook CB52088292) [S5]; (2) MOQ elasticity — 2 t (Okorder PP fiber) [S7] vs 2,000 m² (Made-in-China geotextile) [S2] vs 50 m (Made-in-China PP rope) [S8]; (3) Trading vs factory — Gold Member Manufacturer/Factory & Trading Company (New Yuda, Guangxi) [S3] vs pure trading house (InterBusinessGroup, Omsk) [S1]; (4) Geographic logistics — Russia/FSU (Omsk) [S1] vs China main-port (Okorder) [S7] vs Guangdong (rope) [S8].
For a film/liner converter that needs traceable grade: Made-in-China "Polypropylene Inside" with SGS + Audited filters stacked, plus a CAS 9003-07-0 cross-check on the supplier's CoA [S2]. For a fiber-spinner that needs volume: Okorder's 2 t MOQ with 3,000,000 t/month aggregate supply and TT/LC terms [S7]. For a rope/twine converter: Made-in-China's 8-supplier, 24-product PP-rope index out of Zhongshan, Guangdong, response time ≤3 h [S8]. For a Russia-domestic buyer: ChemNet's Omsk entry is the only index hit, so the practical path is a direct RFQ to [email protected] rather than a multi-bid RFQ basket [S1].
Limitations, Failure Modes, and Trackable Next Nodes
Directory coverage on PP has three structural limits. First, CAS field is often missing — the ChemicalBook special-resin page shows blank EINECS, MW, and Mol File, so a buyer cannot grade-verify the offer from the listing alone [S5]. Second, the same listing type mixes manufacturer and trading company — New Yuda's "Manufacturer/Factory & Trading Company" tag in Guangxi means an RFQ may be routed to a trading desk, not the production line [S3]. Third, supply-capability numbers on Okorder are aggregate, not single-factory — the 3,000,000 t/month figure is a group capability, not a guaranteed draw from one asset [S7].
Trackable next signals for the 2026 sourcing cycle: (a) the Made-in-China Polypropylene Inside page-4 RFQ volume as a proxy for film-grade demand, (b) any new ISO 9001:2015 certifications added to Shandong/Jinan PP-fiber factory profiles [S4], and (c) the ChemNet Russia supplier count delta against 2025-08 baseline as an FSU import-substitution gauge [S1]. For broader polyethylene and ethylene-feedstock context, the polyethylene resin upstream and downstream ethylene-to-converter map traces the parallel PE/PP cracker economics.
For the relevant spec sheets and selection criteria, see resin sand line, and pressure transmitter.