Skip to main content
CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
CAS 0 records

CAS 98-51-1

CAS 98-51-1 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

Check this CAS numberBrowse annexes

Chemical identity and properties

PubChem 2D chemical structure for CAS 98-51-1
CAS 98-51-1PubChem CID 7390

4-tert-Butyltoluene

P-tert-butyltoluene is a clear colorless liquid with an aromatic gasoline-like odor. (NTP, 1992) — CAMEO Chemicals

IUPAC name
1-tert-butyl-4-methylbenzene
Molecular formula
C11H16
Molecular weight
148.24 g/mol
Exact mass
148.125200510 Da
XLogP3
4.5
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
0
Covalent units
1
Defined stereocentres
0

Also known as

p-tert-Butyltoluene4-T-BUTYLTOLUENE1-Methyl-4-tert-butylbenzenep-Methyl-tert-butylbenzeneToluene, p-tert-butyl-Benzene, 1-(1,1-dimethylethyl)-4-methyl-4-tert-Butyl-1-methylbenzenePTBT
16 more reported names
4-Methyl-tert-butylbenzene8-Methylparacymenep-TBTAI3-26435NSC-6589Benzene, 1-methyl-4-(1,1-dimethylethyl)-1-(1,1-DIMETHYLETHYL)-4-METHYLBENZENEpara-tert-butyltolueneRefChem:100526202-675-91-(tert-Butyl)-4-methylbenzenep-t-ButyltolueneNSC 65891-tert-butyl-4-methyl-benzeneCAS-98-51-1p-tert-butyl toluene
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 98-51-1

0 total
No records found for this CAS number.

How CAS 98-51-1 is used on this site

CAS 98-51-1 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 98-51-1 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.