National Occupational Exposure Survey
(1981 - 1983)

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

Agent Name SN, TIN-MF UNKNOWN
CAS # 7440-31-5
RTECS # XP7320000
Agent Code 73075

SIC Industry Description (1972) Total # Employees
(Male & Female)
Total # Female
Employees
13 OIL AND GAS EXTRACTION 1,399  
15 GENERAL BUILDING CONTRACTORS 8,289 453
16 HEAVY CONSTRUCTION CONTRACTORS 19,435 614
17 SPECIAL TRADE CONTRACTORS 125,248 40
20 FOOD AND KINDRED PRODUCTS 2,786  
21 TOBACCO MANUFACTURERS 16  
22 TEXTILE MILL PRODUCTS 1,332  
23 APPAREL AND OTHER TEXTILE PRODUCTS 5,781 287
24 LUMBER AND WOOD PRODUCTS 2,634  
25 FURNITURE AND FIXTURES 870 24
26 PAPER AND ALLIED PRODUCTS 7,663 1,728
27 PRINTING AND PUBLISHING 3,337 332
28 CHEMICALS AND ALLIED PRODUCTS 6,437 361
29 PETROLEUM AND COAL PRODUCTS 838 294
30 RUBBER AND MISC. PLASTICS PRODUCTS 6,922 108
31 LEATHER AND LEATHER PRODUCTS 48  
32 STONE, CLAY, AND GLASS PRODUCTS 2,679  
33 PRIMARY METAL INDUSTRIES 17,206 2,914
34 FABRICATED METAL PRODUCTS 45,634 22,562
35 MACHINERY, EXCEPT ELECTRICAL 81,749 33,558
36 ELECTRIC AND ELECTRONIC EQUIPMENT 182,299 123,839
37 TRANSPORTATION EQUIPMENT 29,756 6,000
38 INSTRUMENTS AND RELATED PRODUCTS 54,247 27,900
39 MISCELLANEOUS MANUFACTURING INDUSTRIES 14,969 10,036
40 RAILROAD TRANSPORTATION 196  
41 LOCAL AND INTERURBAN PASSENGER TRANSIT 516  
42 TRUCKING AND WAREHOUSING 5,172 201
45 TRANSPORTATION BY AIR 14,888 57
46 PIPE LINES, EXCEPT NATURAL GAS 599  
48 COMMUNICATION 31,543 1,827
49 ELECTRIC, GAS, AND SANITARY SERVICES 10,861 63
50 WHOLESALE TRADE - DURABLE GOODS 1,085 46
51 WHOLESALE TRADE - NONDURABLE GOODS 1,359  
55 AUTOMOTIVE DEALERS & SERVICE STATIONS 2,743 427
73 BUSINESS SERVICES 10,846 1,190
75 AUTO REPAIR, SERVICES, AND GARAGES 13,392  
76 MISCELLANEOUS REPAIR SERVICES 25,673 2,153
80 HEALTH SERVICES 7,979 388
TOTAL 748,577 237,405

*(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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