PRODUCT INFORMATION

Nomenclature and CAS Numbers for Nonylphenol

Nonylphenol (NP) is produced by the reaction of phenol with branched nonene. Commercial synthesis results in a mixture of various branched nonylphenol isomers rather than a discrete chemical structure. The nonyl group is positioned predominantly in the para position on the phenol ring. Over the years there has been a shift in US EPA's interpretation of chemical names assigned to Chemical Abstract Services (CAS) registry numbers (RNs) in that nomenclatures and CAS RNs that do not specify branching on alkyl groups are now assumed to represent linear structures. Therefore, the Alkylphenols & Ethoxylates Research Council (APERC) considers CAS RN 84852-15-3 to be most descriptive of commercially available NP. Other CAS numbers are less descriptive with respect to the branching and position of the nonyl group on the phenol ring. Linear, or normal, n-NP is difficult to produce and is therefore not likely to be commercially relevant.

CAS NUMBER	DESCRIPTION
25154-52-3	Phenol, nonyl- (assumes linear alkyl, not viewed as descriptive of commercial NP)
104-40-5	Phenol, 4-nonyl- (assumes linear alkyl, not viewed as descriptive of commercial NP)
84852-15-3	Phenol, 4-nonyl-, branched

                                                                                                                             

 

 

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