National Occupational Exposure Survey
(1981 - 1983)

Estimated Percentages of Controlled and Uncontrolled Potential Exposures to Specific Agents by Occupation within 2-Digit Standard Industrial Classification (SIC)*

Agent Name MALEIC ANHYDRIDE
CAS # 108-31-6
RTECS # ON3675000 
Agent Code 43660

FURNITURE AND FIXTURES (SIC 25)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
339
889 LABORERS, EXCEPT CONSTRUCTION 100.0%
0.0%
0.0%
0.0%
0.0%
1,356
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
1,695
PAPER AND ALLIED PRODUCTS (SIC 26)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
734 PRINTING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
1,046
SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
1,046
PRINTING AND PUBLISHING (SIC 27)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
453 JANITORS AND CLEANERS 0.0%
0.0%
0.0%
100.0%
0.0%
84
645 PATTERNMAKERS AND MODEL MAKERS, METAL 100.0%
0.0%
0.0%
0.0%
0.0%
250
734 PRINTING MACHINE OPERATORS 97.9%
0.0%
0.0%
2.1%
0.0%
36,418
735 PHOTOENGRAVERS AND LITHOGRAPHERS 70.0%
0.0%
30.0%
0.0%
0.0%
179
737 MISCELLANEOUS PRINTING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
1,283
SUBTOTAL 94.2%
0.0%
0.1%
5.5%
0.0%
38,214
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
019 MANAGERS AND ADMINISTRATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
1,234
216 ENGINEERING TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
380
224 CHEMICAL TECHNICIANS 7.0%
0.0%
53.0%
40.0%
0.0%
8,091
225 SCIENCE TECHNICIANS, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
626
235 TECHNICIANS, N.E.C. 0.0%
0.0%
100.0%
0.0%
0.0%
512
364 TRAFFIC, SHIPPING, AND RECEIVING CLERKS 100.0%
0.0%
0.0%
0.0%
0.0%
592
365 STOCK AND INVENTORY CLERKS 0.0%
0.0%
50.0%
50.0%
0.0%
132
453 JANITORS AND CLEANERS 6.4%
0.0%
60.9%
32.8%
0.0%
6,931
519 MACHINERY MAINTENANCE OCCUPATIONS 0.0%
0.0%
0.0%
100.0%
0.0%
22
544 MILLWRIGHTS 100.0%
0.0%
0.0%
0.0%
0.0%
766
549 NOT SPECIFIED MECHANICS AND REPAIRERS 0.0%
0.0%
0.0%
100.0%
0.0%
470
567 CARPENTERS 0.0%
0.0%
0.0%
100.0%
0.0%
57
575 ELECTRICIANS 0.0%
0.0%
100.0%
0.0%
0.0%
79
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 0.0%
0.0%
0.0%
100.0%
0.0%
44
593 INSULATION WORKERS 0.0%
0.0%
0.0%
100.0%
0.0%
44
633 SUPERVISORS, PRODUCTION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
171
637 MACHINISTS 0.0%
0.0%
0.0%
100.0%
0.0%
57
653 SHEET METAL WORKERS 0.0%
0.0%
0.0%
100.0%
0.0%
75
694 WATER AND SEWAGE TREATMENT PLANT OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
66
699 MISCELLANEOUS PLANT AND SYSTEM OPERATORS 0.0%
0.0%
33.4%
66.6%
0.0%
119
754 PACKAGING AND FILLING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
179
756 MIXING AND BLENDING MACHINE OPERATORS 39.2%
0.0%
0.0%
60.8%
0.0%
4,943
757 SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS 11.4%
0.0%
80.5%
0.0%
8.1%
5,330
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 0.0%
0.0%
40.3%
25.2%
34.5%
227
766 FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD 0.0%
0.0%
0.0%
100.0%
0.0%
18
769 SLICING AND CUTTING MACHINE OPERATORS 0.0%
0.0%
66.7%
33.3%
0.0%
257
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 62.2%
1.6%
3.3%
32.9%
0.0%
4,826
779 MACHINE OPERATORS, NOT SPECIFIED 100.0%
0.0%
0.0%
0.0%
0.0%
296
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 0.0%
0.0%
0.0%
100.0%
0.0%
9
798 PRODUCTION SAMPLERS AND WEIGHERS 100.0%
0.0%
0.0%
0.0%
0.0%
889
859 MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
637
888 HAND PACKERS AND PACKAGERS 0.0%
0.0%
0.0%
100.0%
0.0%
3,577
889 LABORERS, EXCEPT CONSTRUCTION 0.0%
0.0%
100.0%
0.0%
0.0%
279
SUBTOTAL 25.9%
0.1%
33.8%
38.8%
1.2%
41,935
PETROLEUM AND COAL PRODUCTS (SIC 29)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
073 CHEMISTS, EXCEPT BIOCHEMISTS 0.0%
0.0%
100.0%
0.0%
0.0%
7
224 CHEMICAL TECHNICIANS 0.0%
0.0%
100.0%
0.0%
0.0%
223
SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
230
RUBBER AND MISC. PLASTICS PRODUCTS (SIC 30)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
755 EXTRUDING AND FORMING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
1,234
756 MIXING AND BLENDING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
726
888 HAND PACKERS AND PACKAGERS 0.0%
0.0%
0.0%
100.0%
0.0%
4,042
SUBTOTAL 20.5%
0.0%
12.0%
67.3%
0.0%
6,002
PRIMARY METAL INDUSTRIES (SIC 33)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
225 SCIENCE TECHNICIANS, N.E.C. 0.0%
0.0%
0.0%
100.0%
0.0%
476
453 JANITORS AND CLEANERS 0.0%
0.0%
0.0%
100.0%
0.0%
1,746
756 MIXING AND BLENDING MACHINE OPERATORS 0.0%
50.0%
0.0%
50.0%
0.0%
1,905
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 0.0%
0.0%
50.0%
50.0%
0.0%
13,051
SUBTOTAL 0.0%
5.5%
37.9%
56.4%
0.0%
17,178
FABRICATED METAL PRODUCTS (SIC 34)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
507 BUS, TRUCK, AND STATIONARY ENGINE MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
111
519 MACHINERY MAINTENANCE OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
65
724 HEAT TREATING EQUIPMENT OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
140
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 0.0%
0.0%
81.5%
18.5%
0.0%
86
SUBTOTAL 43.7%
0.0%
52.2%
3.9%
0.0%
402
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
47
549 NOT SPECIFIED MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
201
579 PAINTERS, CONSTRUCTION AND MAINTENANCE 50.0%
0.0%
50.0%
0.0%
0.0%
147
636 PRECISION ASSEMBLERS, METAL 100.0%
0.0%
0.0%
0.0%
0.0%
1,119
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
201
684 MISCELLANEOUS PRECISION WORKERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
60
719 MOLDING AND CASTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
165
734 PRINTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
5
749 MISCELLANEOUS TEXTILE MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
1,482
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 0.0%
5.6%
0.0%
94.4%
0.0%
1,158
768 CRUSHING AND GRINDING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
55
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
646
887 VEHICLE WASHERS AND EQUIPMENT CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
81
SUBTOTAL 77.0%
1.2%
1.3%
20.3%
0.0%
5,367
ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
444 MISCELLANEOUS FOOD PREPARATION OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
20
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
36
617 MINING OCCUPATIONS, N.E.C. 34.8%
0.0%
65.2%
0.0%
0.0%
1,520
703 LATHE AND TURNING MACHINE SET-UP OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
52
723 METAL PLATING MACHINE OPERATORS 0.0%
0.0%
50.0%
50.0%
0.0%
23
727 SAWING MACHINE OPERATORS 0.0%
0.0%
50.0%
50.0%
0.0%
61
755 EXTRUDING AND FORMING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
304
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 33.3%
0.0%
66.7%
0.0%
0.0%
92
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 58.7%
2.8%
28.4%
10.2%
0.0%
1,201
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
150
SUBTOTAL 42.5%
0.9%
41.5%
15.0%
0.0%
3,459
TRANSPORTATION EQUIPMENT (SIC 37)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
496 TIMBER CUTTING AND LOGGING OCCUPATIONS 0.0%
0.0%
75.0%
25.0%
0.0%
1,588
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 0.0%
0.0%
0.0%
50.0%
50.0%
352
567 CARPENTERS 61.7%
0.0%
29.0%
9.2%
0.0%
4,546
579 PAINTERS, CONSTRUCTION AND MAINTENANCE 0.0%
0.0%
100.0%
0.0%
0.0%
993
634 TOOL AND DIE MAKERS 100.0%
0.0%
0.0%
0.0%
0.0%
350
655 MISCELLANEOUS PRECISION METAL WORKERS 100.0%
0.0%
0.0%
0.0%
0.0%
122
656 PATTERNMAKERS AND MODEL MAKERS, WOOD 0.0%
0.0%
100.0%
0.0%
0.0%
247
675 HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS 100.0%
0.0%
0.0%
0.0%
0.0%
9
676 PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
35
703 LATHE AND TURNING MACHINE SET-UP OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
259
709 GRINDING, ABRADING, BUFFING, AND POLISHING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
210
719 MOLDING AND CASTING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
43
753 CEMENTING AND GLUING MACHINE OPERATORS 6.3%
0.0%
93.7%
0.0%
0.0%
1,380
756 MIXING AND BLENDING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
21
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 45.0%
0.0%
52.5%
2.4%
0.0%
1,554
779 MACHINE OPERATORS, NOT SPECIFIED 11.9%
9.3%
32.1%
46.7%
0.0%
1,612
785 ASSEMBLERS 56.3%
6.9%
6.9%
14.9%
14.9%
496
888 HAND PACKERS AND PACKAGERS 0.0%
0.0%
100.0%
0.0%
0.0%
11
SUBTOTAL 34.9%
1.3%
47.9%
13.8%
1.8%
13,828
INSTRUMENTS AND RELATED PRODUCTS (SIC 38)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
169
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
65
SUBTOTAL 27.7%
0.0%
0.0%
72.2%
0.0%
234
MISCELLANEOUS MANUFACTURING INDUSTRIES (SIC 39)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
013 MANAGERS, MARKETING, ADVERTISING, AND PUBLIC RELATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
241
019 MANAGERS AND ADMINISTRATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
3,467
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
446
734 PRINTING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
20,801
756 MIXING AND BLENDING MACHINE OPERATORS 96.4%
0.0%
0.0%
3.6%
0.0%
2,892
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 12.8%
29.1%
0.0%
29.1%
29.1%
4,549
769 SLICING AND CUTTING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
6,934
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.7%
0.0%
0.0%
99.3%
0.0%
28,086
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
580
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 0.0%
0.0%
0.0%
100.0%
0.0%
223
887 VEHICLE WASHERS AND EQUIPMENT CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
2,790
889 LABORERS, EXCEPT CONSTRUCTION 0.0%
0.0%
100.0%
0.0%
0.0%
13,868
SUBTOTAL 13.0%
1.5%
49.0%
34.8%
1.5%
84,877
WATER TRANSPORTATION (SIC 44)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 0.0%
50.0%
50.0%
0.0%
0.0%
109,291
833 MARINE ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
7,896
SUBTOTAL 6.7%
46.6%
46.6%
0.0%
0.0%
117,187
TRANSPORTATION BY AIR (SIC 45)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
453 JANITORS AND CLEANERS 0.0%
100.0%
0.0%
0.0%
0.0%
599
518 INDUSTRIAL MACHINERY REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
9
653 SHEET METAL WORKERS 0.0%
0.0%
100.0%
0.0%
0.0%
944
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
3
SUBTOTAL 0.7%
38.5%
60.7%
0.0%
0.0%
1,555
ELECTRIC, GAS, AND SANITARY SERVICES (SIC 49)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
567 CARPENTERS 100.0%
0.0%
0.0%
0.0%
0.0%
105
577 ELECTRICAL POWER INSTALLERS AND REPAIRERS 0.0%
0.0%
75.0%
25.0%
0.0%
3,734
SUBTOTAL 2.7%
0.0%
72.9%
24.3%
0.0%
3,839
WHOLESALE TRADE - DURABLE GOODS (SIC 50)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
684 MISCELLANEOUS PRECISION WORKERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
653
889 LABORERS, EXCEPT CONSTRUCTION 0.0%
0.0%
50.0%
50.0%
0.0%
1,192
SUBTOTAL 35.3%
0.0%
32.3%
32.3%
0.0%
1,845
AUTOMOTIVE DEALERS & SERVICE STATIONS (SIC 55)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
153
SUBTOTAL 100.0%
0.0%
0.0%
0.0%
0.0%
153
BUSINESS SERVICES (SIC 73)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
073 CHEMISTS, EXCEPT BIOCHEMISTS 0.0%
0.0%
33.4%
66.6%
0.0%
1,475
075 GEOLOGISTS AND GEODESISTS 0.0%
0.0%
50.0%
50.0%
0.0%
56
216 ENGINEERING TECHNICIANS, N.E.C. 0.0%
0.0%
33.3%
66.7%
0.0%
211
719 MOLDING AND CASTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
789
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
995
SUBTOTAL 50.5%
0.0%
16.7%
32.6%
0.0%
3,526
HEALTH SERVICES (SIC 80)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
449 MAIDS AND HOUSEMEN 0.0%
0.0%
100.0%
0.0%
0.0%
115
579 PAINTERS, CONSTRUCTION AND MAINTENANCE 100.0%
0.0%
0.0%
0.0%
0.0%
171
SUBTOTAL 59.7%
0.0%
40.2%
0.0%
0.0%
286
TOTAL 24.0%
16.8%
38.6%
19.8%
0.6%
342,858
RELATED PAGES: Estimates by SIC, Estimates by Occupation, Estimates by Occupation within SIC
ABBREVIATIONS:
Resp Prot = Respiratory Protection
Other PPE = Personal Protective Equipment Other Than Respiratory Protection
Vent = Ventilation

*(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 estimated numbers of exposures, 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. (4) For a given occupation, the estimated number of potential exposures is not necessarily equal to the estimated total number of potentially exposed workers. For example, a worker may be exposed to the same agent from multiple sources; thus, it is not the worker that is controlled but the exposure. (5) The presence or absence of controls does not imply that controls are necessary or required. The estimates and the controls are strictly based on observations associated with potential exposures.

NIOSH Home | NIOSH Search | Site Index | Contact Us | NOES Home