AROCLOR 1248, 1X1ML, ISO, 1UG/ML Chemical Properties

Melting point:

63.91°C (estimate)

Boiling point:

370.42°C (rough estimate)

Density 

1.4100 (estimate)

vapor pressure 

1.835 at 25 °C (estimated using GC retention data, Foreman and Bidleman, 1985)

refractive index 

1.6130 (estimate)

Flash point:

11 °C

storage temp. 

room temp

solubility 

Benzoic acid (10.0 wt % at 32 °C) and paraffin (2.0 wt % at 28 °C) (Monsanto, 1960).

Water Solubility 

0.1mg/L(20 ºC)

Henry's Law Constant

3.67 at 25 °C (Slinn et al., 1978)

Exposure limits

Potential occupational carcinogen. NIOSH REL: TWA 1.0 g/m³, IDLH 5 mg/m³.

EPA Substance Registry System

Aroclor 1248 (12672-29-6)

Safety Information

Hazard Codes 

Xi,N,T,F,Xn

Risk Statements 

36/37/38-50/53-33-39/23/24/25-23/24/25-11-67-65-38-62-51/53-48/20-52/53-45

Safety Statements 

26-61-60-35-45-36/37-16-7-62-33-29-9-36-53

RIDADR 

2315

WGK Germany 

3

RTECS 

TQ1358000

HazardClass 

9

PackingGroup 

II

Hazardous Substances Data

12672-29-6(Hazardous Substances Data)

Toxicity

Acute oral LD50 for rats 11 g/kg (quoted, RTECS, 1985).

AROCLOR 1248, 1X1ML, ISO, 1UG/ML Usage And Synthesis

Chemical Properties

Viscous, oily, light yellow to yellow-green, mobile, dense, nonflammable liquid with a faint odor

Uses

In epoxy resins to improve adhesion and resistance to chemical attack; as an insulator fluid for electric condensers and as an additive in very high pressure lubricants. In fluorescent and highintensity discharge ballasts manufactured prior to 1979 (U.S. EPA, 1998).
PCB-1248 and PCB-1254 were used instead of silicone oils in vacuum pumps (Monsanto, 1960).
At a concentration of 5 to 25 wt %, increased the effective kill-life of the lindane spray up to 10 times. May have been used in chlordane and BHC insecticide formulations (Monsanto, 1960).

Definition

ChEBI: 3,3',5,5'-tetrachlorobiphenyl is a tetrachlorobiphenyl that is biphenyl in which both phenyl groups are substituted by chlorines at positions 3 and 5. It is a tetrachlorobiphenyl and a dichlorobenzene.

General Description

Viscous oily liquid.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Simple aromatic halogenated organic compounds are very unreactive. Reactivity generally decreases with increased degree of substitution of halogen for hydrogen atoms.

Health Hazard

ACUTE/CHRONIC HAZARDS: Toxic irritant. Hazardous decomposition products.

Fire Hazard

Some may burn but none ignite readily. Containers may explode when heated. Some may be transported hot.

Safety Profile

Suspected human carcinogen. Moderately toxic by skin contact. Experimental teratogenic and reproductive effects. When heated to decomposition it emits toxic fumes of Cl-. Used in heat transfer, hydraulic fluids, lubricants, and insecticides. See also POLYCHLORINATED BIPHENYLS.

Environmental Fate

Biological. Reported degradation products by the microorganism Alcaligenes BM-2 for a mixture of polychlorinated biphenyls include monohydroxychlorobiphenyl, 2-hydroxy-6- oxochlorophenylhexa-2,4-dieonic acid, chlorobenzoic acid, chlorobenzoylpropionic acid, chlorophenylacetic acid, and 3-chlorophenyl-2-chloropropenic acid (Yagi and Sudo, 1980). When PCB-1248 (5 and 10 mg/) was statically incubated in the dark at 25 °C with yeast extract and settled domestic wastewater inoculum, no biodegradation was observed (Tabak et al., 1981).
Chemical/Physical. Heating PCB-1248 in oxygen at 270–300 °C for 1 wk resulted in the formation of mono-, di-, tri-, tetra-, and pentachlorodibenzofurans (PCDFs). At temperatures greater than 330 °C, PCDFs decompose (Morita et al., 1978).
PCB-1248 will not hydrolyze to any reasonable extent (Kollig, 1993).
When PCB-1248 was heated up to 315 °C in a closed system, no appreciable decomposition was observed (Monsanto, 1960).
Mackay and Wolkoff (1973) estimated an evaporation half-life of 58.3 min from a surface water body that is 25 °C and 1 m deep.