Phthalate Di-isodecyl & Di-isononyl phthalates

1. What are the properties of DIDP and DINP?

The source document for this Digest states:

DIDP

IDENTIFICATION OF THE SUBSTANCE

In this risk assessment report two di “isodecyl” phthalate products (hereafter referred to as DIDP) are evaluated. There are two different CAS numbers. Following specific information from the European Council for Plasticizers & Intermediates, these two products are prepared essentially from the same feed, through an identical olefin oligomerisation process and through similar alcohol manufacturing and phthalate esterification processes. The two phthalates are therefore considered fully interchangeable within their whole range of the market end-uses. Only one risk assessment is performed for the two compounds.

CAS Number: 68515-49-1 and 26761-40-0
EINECS Number: 271-091-4 and 247-977-1
IUPAC Name: 1,2-Benzenedicarboxylic acid, di-C9-11 branched alkyl esters, C₉ rich and di-“isodecyl” phthalate
Molecular weight: Average 446.68
Molecular formula: C₂₈H₄₆O₄ (average)

PHYSICO-CHEMICA L PROPERTIES

Table 1.1 Summary of physico-chemical properties (DIDP)

CLASSIFICATION

No classification.

Source & ©: ECB "2003 Risk Assessment Report (RAR 041) on
Di-"isodecyl" Phthalate (DIDP), Summary of the Report, chapter 1: General Substance Information , Introduction (p.11-12)

DINP

IDENTIFICATION OF THE SUBSTANCE

CAS Number: 68515-48-0 and 28553-12-0

EINECS Number: 271-090-9 and 249-079-5
IUPAC Name: 1,2-Benzenedicarboxylic acid, di-C8-10 branched alkylesters, C₉ rich and di-“isononyl” phthalate

Molecular weight: Average 420.6

Molecular formula: C_8+2xH_6+4xO₄ with x = 8 to 10

(x = 9 as main constituent), average C₂₆H₄₂O₄

PHYSICO-CHEMICAL PROPERTIES

Table 1.1 Summary of physico-chemical properties (DINP)

CLASSIFICATION

No classification.

Source & ©: ECB "2003 Risk Assessment Report (RAR 046) on
Di-"isodecyl" Phthalate (DIDP), Summary of the Report, chapter 1: General Substance Information

For more information, see the full ECB Risk Assessment Report:
 Chapter 1: General Substance Information

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