National Occupational Exposure Survey
(1981 - 1983)

Estimated Numbers of Employees Potentially Exposed to Specific Agents by 2-Digit Standard Industrial Classification (SIC)*

Agent Name ISOPHTHALONITRILE, TETRACHLORO-
CAS # 1897-45-6
RTECS # NT2600000
Agent Code T1833

SIC Industry Description (1972) Total # Employees
(Male & Female)
Total # Female
Employees
15 GENERAL BUILDING CONTRACTORS 8,114  
17 SPECIAL TRADE CONTRACTORS 8,904  
20 FOOD AND KINDRED PRODUCTS 202  
24 LUMBER AND WOOD PRODUCTS 1,681 516
25 FURNITURE AND FIXTURES 654  
28 CHEMICALS AND ALLIED PRODUCTS 3,972 287
32 STONE, CLAY, AND GLASS PRODUCTS 583  
34 FABRICATED METAL PRODUCTS 2,286  
35 MACHINERY, EXCEPT ELECTRICAL 19,275 5,712
48 COMMUNICATION 13,491 36
49 ELECTRIC, GAS, AND SANITARY SERVICES 1,495  
50 WHOLESALE TRADE - DURABLE GOODS 173  
75 AUTO REPAIR, SERVICES, AND GARAGES 118  
80 HEALTH SERVICES 134  
84 MUSEUMS, BOTANICAL, ZOOLOGICAL GARDENS 1,643 164
TOTAL 62,724 6,716

*(1) By survey design, not all 2-digit SICs were surveyed. (2) The estimates for each 2-digit SIC apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC. Not all SICs were surveyed. (3) When using the estimates, standard errors associated with estimates should be considered. (4) Potential exposures to a chemical agent are categorized as actual (i.e., the surveyor observed the use of the specific agent) or tradename (i.e., the surveyor observed the use of a tradename product known to contain the specific agent). The estimates presented in the table combine both categories.

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