National Occupational Exposure Survey
(1981 - 1983)

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

Agent Name TRIMELLITIC ANHYDRIDE
CAS # 552-30-7
RTECS # DC2050000 
Agent Code 83588

TEXTILE MILL PRODUCTS (SIC 22)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
739 KNITTING, LOOPING, TAPING, AND WEAVING MACHINE OPERATORS 5,175
1,964
749 MISCELLANEOUS TEXTILE MACHINE OPERATORS 666

SUBTOTAL 5,841
1,964
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
224 CHEMICAL TECHNICIANS 3,452
573
453 JANITORS AND CLEANERS 891

756 MIXING AND BLENDING MACHINE OPERATORS 1,203

777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 1,110

779 MACHINE OPERATORS, NOT SPECIFIED 1,368
288
859 MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS 360

SUBTOTAL 8,384
861
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 15

785 ASSEMBLERS 537

SUBTOTAL 552

ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
213 ELECTRICAL AND ELECTRONIC TECHNICIANS 5

719 MOLDING AND CASTING MACHINE OPERATORS 19
12
785 ASSEMBLERS 2,314
2,314
SUBTOTAL 2,338
2,326
BUSINESS SERVICES (SIC 73)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
073 CHEMISTS, EXCEPT BIOCHEMISTS 629
85
SUBTOTAL 629
85
TOTAL 17,744 5,236
RELATED PAGES: Estimates by SIC, Estimates by Occupation

*(1) The estimates for each occupation apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC where the agent was observed. Not all SICs were surveyed, and not all agents were observed in all surveyed SICs. (2) When using the estimates, standard errors associated with estimates should be considered. (3) 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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