Product Identification

Product Name

4,5,6,7-Tetrachloro-1,3-isobenzofurandione

Synonyms

4,5,6,7-Tetrachloro-1,3-isobenzofurandione
4,5,6,7-Tetrachloro-2-benzofuran-1,3-dione
Niagathal
Tetrathal

CAS

117-08-8

Formula

C8Cl4O3

Molecular Weight

285.88

EINECS

204-171-4

RTECS

TI3450000

RTECS Class

Tumorigen; Primary Irritant

Beilstein/Gmelin

211560

Beilstein Reference

5-17-11-00260

EC Index Number

607-242-00-1

EC Class

Irritant; Sensitising; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Odorless needle-like crystals or white powder.

Solubility in water

Insoluble

Boiling Point

371

Vapor Pressure

1E-5 (25 C)

Density

1.52 g/cm3 (275 C)

Partition Coefficient

2.63

Heat Of Vaporization

61.8 kJ/mol

Usage

Flame retardant in unsaturated polyester resins, polyurethane foams & surface coatings, chemical intermediate for pigment green 7, drugs & plasticizers.

First Aid Measures

Ingestion

DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician.

Inhalation

IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.

Skin

IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.

Eyes

First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Handling and Storage

Storage

Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Inhalation

Bronchial asthma and upper respiratory irritation may occur and recur for as long as 4 years after avoidance of exposure.

Skin

Phthalic acid anhydride is a delayed, direct skin irritant.

EC Risk Phrase

R 41 42/43 50/53

EC Safety Phrase

S 22 24 26 37/39 60 61

UN (DOT)

3077

Exposure Controls/Personal Protection

Personal Protection

Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.

Respirators

Wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter.

Exposure Effects

The toxological properties of this substance have not been fully investigated.

Exposure limit(s)

OSHA: Possible Select carcinogen

Poison Class

2

Fire Fighting Measures

Flash Point

162

Autoignition

362

Fire Fighting

Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher.

Fire Potential

This material is probably combustible.

Accidental Release Measures

Small spills/leaks

If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. You should then dampen the solid spill material with 60-70% methanol, then transfer the dampened material to a suitable container. Use absorbent paper dampened with methanol to pick up any remaining material. Your contaminated clothing and absorbent paper should be sealed in a vapor-tight plastic bag for eventual disposal. Solvent-wash contaminated surfaces with 60-70% methanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.

Stability and Reactivity

Stability

No data.

Incompatibilities

Reacts exothermically with water Reaction with water is accelerated by acids Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases.

Transport Information

UN Number

3077