Diisononyl Phthalate

CAS Number: 28553-12-0

Also known as: 1,2-Benzenedicarboxylic Acid, 1,2-Diisononyl Ester, Diisononyl Phthalate, Phtalate De Diisononyle
Information on chemical

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List


CAS number 28553-12-0
Formula C26H42O4

Physical chemical data

Physical State (25°C) Liquid
Kinematic viscosity (cSt)
82.47 [cSt] at a temperature of 20°C
Molar mass (g/mol) 418.609
Solubility (g/L)
0.2 [g/L] at a temperature of 20°C and salinity of 0‰
Boiling Point (°C) 432
Melting Point (°C) -42
Flash Point (Pensky-Martens closed cup) (°C) 221
Henry's constant (mol/(m³·Pa)) 0.15

Behaviour at sea

Log kow 9.37
Log koc 5.52
Biodegradation in estuary environment (Half-life) (days) 1242
Bioconcentration factor (BCF) 230

Additional data

MARPOL pollution category
Category Description
Other Substances Substances which have been evaluated and found to fall outside Category X, Y or Z because they are considered to present no harm to marine resources, human health, amenities or other legitimate uses of the sea when discharged into the sea from tank cleaning of deballasting operations. The discharge of bilge or ballast water or other residues or mixtures containing these substances are not subject to any requirements of MARPOL Annex II.

Transportation data

Reactivity data

GESAMP Hazard profile

Bioaccumulation in logPow (A1A) 0 - e <1, or > ca.7, or Mol. Wt. > 1000
Bioaccumulation in BCF (A1B) 0 - No measurable BCF
Bioaccumulation (A1) 0 - No potential to bioaccumulate
Biodegradation (A2) R - Readily biodegradable
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l)) 0 - Non-toxic
Chronic aquatic toxicity (B2) (NOEC (mg/l)) 0 - Negligible
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg)) 0 - Negligible
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg)) 0 - Negligible
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l)) 0 - Negligible
Skin irritation/corrosivity (D1) 0 - Not irritating
Eye irritation/corrosivity (D2) 0 - Not irritating
Interference with coastal amenities (E2) Fp - Persistent slick forming substance
Effects on wildlife and bottom habitats (E3) 2 - Is a persistent floater; and/or is moderately acutely toxic; and/or is irritating to skin and/or eyes; and/or has long-term health effects other than carcinogenicity, mutagenicity or reprotoxicity; and/or is highly flammable; and/or is flammable and is a floater with evaporative properties

Human toxicity threshold


Lowest median lethal concentration (LC50) on fishes (mg/l) 0.42
Highest no observed effect concentration (NOEC) on algae (mg/l) 1.8
Highest no observed effect concentration (NOEC) on crustacean (mg/l) 0.004
Highest no observed effect concentration (NOEC) on fishes (mg/l) 75
Incident reports

Incident reports

No incident reports available

Emergency Response Guidebook

Emergency Response Guidebook

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At sea emergency guide

At sea emergency guide

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Decision trees

Decision trees

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No additional data

last modified 2020-12-11T09:57:22+00:00