Dimethyl phthalate

  • 1,2-Benzenedicarboxylic acid, dimethyl ester
  • 1,2-Dimethyl phthalate
  • Phthalic acid dimethyl ester
Formula
C10H10O4
Structure
Description
Colorless, oily liquid, pale yellow crystals, slight aromatic odor.
Uses
Insect repellent.

Registry Numbers and Inventories.
CAS
131-11-3
EC (EINECS/ELINCS)
205-011-6
RTECS
TI1575000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
9188
Merck
13,3281
Beilstein/Gmelin
1911460
Beilstein Reference
4-09-00-03170
RCRA
U102
EPA OPP
28002
Swiss Giftliste 1
G-1563
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C10H10O4
Formula mass
194.19
Melting point, °C
6
Boiling point, °C
283.7
Vapor pressure, mmHg
0.029 (25 C)
Vapor density (air=1)
6.69
Saturation Concentration
<13 ppm at 20 C (calculated)
Evaporization number
Almost zero
Critical temperature
24.4
Density
1.192 g/cm3 (20 C)
Solubility in water
4.3 g/L
Viscosity
13.92 cp (25 C)
Surface tension
41.85 g/s2 (20 C)
Refractive index
1.5168 (20 C)
Partition coefficient, pKow
1.60
Heat of vaporization
80.8 kJ/mol
Heat of combustion
-4680 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal.
Disposal code
1
Stability
Stable in air but slowly affected by light.
Incompatibilities
Oxidizing agents, acids, bases, and nitrates.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
150
Autoignition, °C
460
Upper exp. limit, %
5.8
Lower exp. limit, %
0.9
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Fire potential
This chemical is combustible.
Hazards
Containers may explode when heated.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (as TWA): ppm; 5 mg/m3 (ACGIH 1994-1995). OSHA PEL: TWA 5 mg/m3 NIOSH REL: TWA 5 mg/m3 NIOSH IDLH: 2000 mg/m3
Poison_Class
4
Exposure effects
Abnormally low blood pressure after ingestion of deet may occur. Acute exposure - neurologic: Dizziness occurred in a human exposure to 10 g of dbp. Polyneuritis was reported in one soviet study. There have been several animal and laboratory tests done on the possible teratogenic effect of DBP. The results have been mixed. Studies done on Salmonella cultures have shown mildly positive mutagenic responses. DBP appears to affect females more than males, at least in the rodent studies performed.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May cause central nervous system depression.
   Inhalation
Inhalation of high concentrations may cause central nervous system effects characterized by headache, dizziness, unconsciousness and coma. Causes respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
Produces irritation, characterized by a burning sensation, redness, tearing, inflammation, and possible corneal injury.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
9188
Response guide
Hazard class
9
USCG CHRIS Code
DTL
 
HS Code
2917 34 00
 
Std. Transport #
4962114
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
P