- ▸ Phenolic intermediate used to make p-tert-butylphenol-formaldehyde tackifying/curing resins for contact and neoprene adhesives
- ▸ Functions in phenolic resin cure systems and as a chain-terminator that controls molecular weight in phenolic resins
- ▸ Used in adhesives, coatings and rubber-bonding resin systems
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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para-tert-Butylphenol is a alkylphenol synthesis intermediate — a building block used in the manufacture of para-tert-butylphenol formaldehyde resins (adhesives, tackifiers), antioxidants, a polycarbonate chain terminator, and fragrance intermediates. Identity: CAS 98-54-4.
What it is
para-tert-Butylphenol (CAS 98-54-4, C10H14O) is a alkylphenol sold as a synthesis intermediate — a defined building block that downstream manufacturers convert into finished products. PTBP is a large-volume alkylphenol intermediate.
Role in synthesis
The phenol reacts with formaldehyde to form resins, can be alkoxylated, and acts as a chain terminator; the tert-butyl group blocks the para position. The substitution pattern (isomer) is part of the identity — confirm the CAS to be sure the isomer matches your route, because position isomers react differently and lead to different products.
What it is used to make
It is a building block toward para-tert-butylphenol formaldehyde resins (adhesives, tackifiers), antioxidants, a polycarbonate chain terminator, and fragrance intermediates. RawSource supplies the intermediate; the downstream synthesis, product registration and any application or efficacy are the responsibility of the manufacturer that uses it.
Forms, grades and handling
Supplied to a defined assay with a Certificate of Analysis (CoA) per lot; define the assay and key impurity limits your route needs. Several halo-aromatic intermediates are hazardous and some are regulated — confirm regulatory status and handling for your jurisdiction, and always consult the current Safety Data Sheet (SDS). Typical values are not a guaranteed specification; the CoA governs.
Bulk and custom-quantity supply
RawSource sources para-tert-Butylphenol direct from producers in bulk and custom quantities, with CoA, TDS and SDS per lot. Tell us the assay and impurity limits and your sample/pilot/production quantity, and we will quote it and confirm supply continuity. See the full range in the intermediates guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Type | Alkylphenol |
| End-use class | Resin, antioxidant & fragrance intermediate |
| CAS Number | 98-54-4 |
| Molecular Formula | C10H14O |
| Molecular Weight | 150.22 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 202-679-0
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Regulatory restriction status
para-tert-Butylphenol (PTBP) (CAS 98-54-4) appears on the regulatory list(s) below. This is public regulatory information about the substance — not a statement about any specific supplier’s material, and not a safety claim. Confirm the current status for your jurisdiction and intended use.
- REACH SVHC Candidate List (EU): listed 16 Jul 2019 on the basis of endocrine-disrupting properties (Art. 57(f)). SVHC status triggers EU supplier-communication and notification duties above 0.1% w/w; it is not, by itself, a ban on sale.
Sources: ECHA Candidate List / Annex XIV / Annex XVII (echa.europa.eu); U.S. EPA TSCA; UN Stockholm Convention / EU POPs Regulation; California OEHHA Proposition 65 list. Retrieved 2026-07-13.
Frequently Asked Questions
What is para-tert-butylphenol used for?
para-tert-Butylphenol (PTBP, CAS 98-54-4) is an alkylphenol intermediate used to make PTBP-formaldehyde resins (adhesives and tackifiers), antioxidants, a polycarbonate chain terminator, and fragrance intermediates.
Can RawSource supply para-tert-butylphenol in bulk or custom quantities?
Yes — RawSource supplies para-tert-butylphenol in bulk and custom (sample/pilot/production) quantities with CoA, TDS and SDS per lot. Tell us the assay, impurity limits and quantity, and we will quote it and confirm supply.
What is the REACH and TSCA regulatory status of para-tert-Butylphenol (PTBP)?
para-tert-Butylphenol (PTBP) (CAS 98-54-4) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 202-679-0).