Dimethyl terphthalate

  • Dimethyl 1,4-benzenedicarboxylate
  • Dimethyl p-phthalate
Formula
C6H4-1,4-(COOCH3)2
Structure
Description
Has no odor.
Uses
Polyester resins for film & fiber prodn, esp polyethylene terephthalate, intermediate.

Registry Numbers and Inventories.
CAS
120-61-6
EC (EINECS/ELINCS)
204-411-8
S 22 24/25
RTECS
WZ1225000
RTECS class
Tumorigen; Mutagen; Primary Irritant
Merck
12,9306
Beilstein/Gmelin
1107185
Beilstein Reference
4-09-00-03303
Swiss Giftliste 1
G-3159
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
139
Boiling point, °C
288
Vapor pressure, mmHg
0.003 (25 C)
Vapor density (air=1)
6.7
Odor Threshold Odor threshold Odorless
Density
1.2 g/cm3 (20 C)
Solubility in water
Insoluble
Surface tension
2.5332x10-2 n/m @ melting point
Partition coefficient, pKow
2.25
Heat of vaporization
52.4 kJ/mol
Heat of combustion
-4657 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. 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
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Disposal code
3
Stability
Stable under normal temperatures and pressures. Finely powdered ester is significant dust explosion hazard.
Incompatibilities
Strong oxidizing agents, strong acids, nitrates.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
141
Autoignition, °C
520
Upper exp. limit, %
5.5
Lower exp. limit, %
0.8
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water fog, dry chemical, carbon dioxide, or regular foam.
Fire potential
This chemical is combustible.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OEL-RUSSIA:STEL 0.1 mg/m3
Poison_Class
4
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause narcotic effects in high concentration. Inhalation of dust may cause respiratory tract irritation.
   Skin
May cause skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
   Eyes
Causes eye irritation.

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.
   Inhalation
Remove from exposure to fresh air immediately.
   Skin
Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
USCG CHRIS Code
DMT
 
HS Code
2917 37 00