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Chemicals, Olefins, Polymers
July 24, 2025
Platts, part of S&P Global Commodity Insights, is proposing to launch a new butene-1 assessment for Southeast Asia, effective Sept. 26.
The proposed assessment would complement Platts existing coverage of ethylene and polyethylene markets in Asia and build on the existing coverage of linear alpha-olefins in the US.
Platts proposes to assess the CFR Southeast Asia butene-1 as a cash differential to the Platts C+F Japan naphtha assessment (Mean of Platts Japan). The cash differential, also known as a premium or a discount, represents the price that counterparties trade against the benchmark values published.
The new assessment, to be published every Friday, would reflect the following parameters and terms:
| Basis and Location | CFR Southeast Asia |
| Cargo size | 1,000-2,000 mt |
| Laycan | Delivery 20-40 days forward from the day of publication |
| UoM | US dollar/mt |
| Specifications | Liquified Gas Min 99% purity |
| Transportation | Pressurized ship |
Market information for products with other specifications and non-standard terms may be considered for the assessment and may be subject to normalization to the standard specifications and terms.
The new assessment would be published in Polymerscan, in Platts database and on Platts Connect.
Please send all feedback, comments and questions to petchems@spglobal.com and pricegroup@spglobal.com by Aug. 15.
For written comments, please provide a clear indication if they are not intended for publication by Platts for public viewing. Platts will consider all comments received and will make comments not marked as confidential available upon request.