National Occupational Exposure Survey
(1981 - 1983)

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

Agent Name SILICIC ACID, POTASSIUM SODIUM SALT
CAS # 37328-88-4
RTECS #
Agent Code X4042

SIC Industry Description (1972) Total # Employees
(Male & Female)		 Total # Female
Employees
13 OIL AND GAS EXTRACTION 3,053  
15 GENERAL BUILDING CONTRACTORS 7,009  
16 HEAVY CONSTRUCTION CONTRACTORS 3,202 100
17 SPECIAL TRADE CONTRACTORS 2,747  
20 FOOD AND KINDRED PRODUCTS 969  
21 TOBACCO MANUFACTURERS 2  
24 LUMBER AND WOOD PRODUCTS 555  
27 PRINTING AND PUBLISHING 61  
28 CHEMICALS AND ALLIED PRODUCTS 967 16
29 PETROLEUM AND COAL PRODUCTS 725  
32 STONE, CLAY, AND GLASS PRODUCTS 159  
33 PRIMARY METAL INDUSTRIES 1,252 8
34 FABRICATED METAL PRODUCTS 13,490  
35 MACHINERY, EXCEPT ELECTRICAL 8,404  
36 ELECTRIC AND ELECTRONIC EQUIPMENT 319 192
37 TRANSPORTATION EQUIPMENT 4,492  
46 PIPE LINES, EXCEPT NATURAL GAS 8,085  
49 ELECTRIC, GAS, AND SANITARY SERVICES 4,694 116
50 WHOLESALE TRADE - DURABLE GOODS 8,233 247
73 BUSINESS SERVICES 494  
76 MISCELLANEOUS REPAIR SERVICES 5,777  
80 HEALTH SERVICES 255  
TOTAL 74,964 679

*(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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