65996-93-2 Usage
Chemical Properties
A nearly black, viscous liquid. On exposure to air, the viscosity gradually increases. It burns in air with a luminous, sooty flame. It has a weight per mL of about 1.15 g.
Uses
Different sources of media describe the Uses of 65996-93-2 differently. You can refer to the following data:
1. Used in treatment of psoriasis.
2. Coal tar pitch is used as a base for paints and coatings, as a
binder for carbon electrodes, for impregnating fiber pipe, in
briquetting coal, in foundry core compounds, as a plasticizer
for elastomers and polymers, as extenders, saturants, impregnants,
and sealants, and in paving and roofing. Occupations
with potential exposures to coal tar, coal tar pitch.
3. Occur as emissions from
coke ovens, from coking of coal tar pitch, and
from Soderberg aluminum reduction electrolytic
cells; used for base coatings and paints;
for roofing and paving; and as a binder for
carbon electrodes
Definition
Different sources of media describe the Definition of 65996-93-2 differently. You can refer to the following data:
1. Tar produced by heating coal in
the absence of oxygen. It is a mixture of
many organic compounds (e.g. benzene,
toluene, and naphthalene) and also contains
free carbon.
2. coal tar: A tar obtained from the destructivedistillation of coal. Formerly,coal tar was obtained as a byproductin manufacturing coal gas.Now it is produced in making cokefor steel making. The crude tar containsa large number of organiccompounds, such as benzene, naphthalene,methylbenzene, phenols,etc., which can be obtained by distillation.The residue is pitch. At onetime coal tar was the major source oforganic chemicals, most of which arenow derived from petroleum andnatural gas.
Hazard
A human carcinogen. Toxic by inhalation.
Combustible.
Health Hazard
Epidemiological evidence suggests
that workers intimately exposed to the
products of combustion or distillation of bituminous
coal are at increased risk of cancer at
many sites, including lungs, kidney, and skin.
The chemical composition and particle
size distribution of coal tar pitch volatiles
(CTPV) from different sources are significant
variables in determining toxicity.
Safety Profile
Confirmed carcinogen
with experimental carcinogenic and
neoplastigenic data by skin contact. When
heated to decomposition it emits acrid
smoke and fumes.
Veterinary Drugs and Treatments
Use of coal tar containing shampoos in veterinary medicine is somewhat controversial, particularly since all veterinary-labeled products
have been withdrawn from the market. However, coal tar shampoos have been used in dogs for treating greasy dermatoses (seborrhea
oleosa) for many years.
Coal tar possesses keratoplastic, keratolytic, vasoconstrictive, antipruritic and degreasing actions. Coal tar’s mechanism of keratoplastic
(keratoregulating) action is probably secondary to decreasing mitosis and DNA synthesis of basal epidermal cells.
Carcinogenicity
The history of coal tar cancers begins with the observations of scrotal cancer in London chimney sweeps by Percivall Pott in 1777. Since that time, a large body of evidence has accumulated demonstrating that workers involved in carbonizing bituminous coal, those handling certain by-products, or those exposed by inhalation of coal tar pitch volatiles are at excess risk of scrotal and other forms of skin, respiratory, and other types of cancer. Coal tar contains many substances that can cause cancer and is a human carcinogen. The toxicity of coal tar may vary with its origin.
Waste Disposal
Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.
Check Digit Verification of cas no
The CAS Registry Mumber 65996-93-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,5,9,9 and 6 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 65996-93:
(7*6)+(6*5)+(5*9)+(4*9)+(3*6)+(2*9)+(1*3)=192
192 % 10 = 2
So 65996-93-2 is a valid CAS Registry Number.
