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 HYDROGEN CYANIDE
CAS # 74-90-8
RTECS # MW6825000 
Agent Code 38530

TEXTILE MILL PRODUCTS (SIC 22)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
216 ENGINEERING TECHNICIANS, N.E.C. 0.0%
0.0%
60.0%
40.0%
0.0%
114
SUBTOTAL 0.0%
0.0%
60.0%
40.0%
0.0%
114
CHEMICALS AND ALLIED PRODUCTS (SIC 28)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
224 CHEMICAL TECHNICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
111
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
4
535 CAMERA, WATCH, AND MUSICAL INSTRUMENT REPAIRERS 0.0%
0.0%
0.0%
0.0%
100.0%
10
633 SUPERVISORS, PRODUCTION OCCUPATIONS 43.9%
0.0%
0.0%
0.0%
56.1%
40
699 MISCELLANEOUS PLANT AND SYSTEM OPERATORS 0.0%
0.0%
50.0%
0.0%
50.0%
106
757 SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
75
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.0%
0.0%
60.0%
0.0%
40.0%
264
779 MACHINE OPERATORS, NOT SPECIFIED 0.0%
0.0%
50.0%
0.0%
50.0%
237
SUBTOTAL 24.5%
0.0%
38.9%
0.0%
36.5%
847
RUBBER AND MISC. PLASTICS PRODUCTS (SIC 30)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
756 MIXING AND BLENDING MACHINE OPERATORS 0.0%
0.0%
100.0%
0.0%
0.0%
96
779 MACHINE OPERATORS, NOT SPECIFIED 0.0%
0.0%
100.0%
0.0%
0.0%
78
SUBTOTAL 0.0%
0.0%
100.0%
0.0%
0.0%
174
PRIMARY METAL INDUSTRIES (SIC 33)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
045 METALLURGICAL AND MATERIALS ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
64
055 ELECTRICAL AND ELECTRONIC ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
5
073 CHEMISTS, EXCEPT BIOCHEMISTS 100.0%
0.0%
0.0%
0.0%
0.0%
19
216 ENGINEERING TECHNICIANS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
40
224 CHEMICAL TECHNICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
37
363 PRODUCTION COORDINATORS 100.0%
0.0%
0.0%
0.0%
0.0%
8
364 TRAFFIC, SHIPPING, AND RECEIVING CLERKS 100.0%
0.0%
0.0%
0.0%
0.0%
8
374 MATERIAL RECORDING, SCHEDULING, AND DISTRIBUTING CLERKS, N.E.C. 40.0%
0.0%
0.0%
0.0%
60.0%
13
453 JANITORS AND CLEANERS 100.0%
0.0%
0.0%
0.0%
0.0%
67
516 HEAVY EQUIPMENT MECHANICS 100.0%
0.0%
0.0%
0.0%
0.0%
11
518 INDUSTRIAL MACHINERY REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
21
519 MACHINERY MAINTENANCE OCCUPATIONS 100.0%
0.0%
0.0%
0.0%
0.0%
27
523 ELECTRONIC REPAIRERS, COMMUNICATIONS AND INDUSTRIAL EQUIPMENT 100.0%
0.0%
0.0%
0.0%
0.0%
88
533 MISCELLANEOUS ELECTRICAL AND ELECTRONIC EQUIPMENT REPAIRERS 0.0%
0.0%
0.0%
0.0%
100.0%
11
539 MECHANICAL CONTROLS AND VALVE REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
37
544 MILLWRIGHTS 100.0%
0.0%
0.0%
0.0%
0.0%
717
547 SPECIFIED MECHANICS AND REPAIRERS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
93
549 NOT SPECIFIED MECHANICS AND REPAIRERS 100.0%
0.0%
0.0%
0.0%
0.0%
16
563 BRICKMASONS AND STONEMASONS 100.0%
0.0%
0.0%
0.0%
0.0%
5
575 ELECTRICIANS 100.0%
0.0%
0.0%
0.0%
0.0%
43
585 PLUMBERS, PIPEFITTERS, AND STEAMFITTERS 100.0%
0.0%
0.0%
0.0%
0.0%
48
637 MACHINISTS 100.0%
0.0%
0.0%
0.0%
0.0%
32
643 BOILERMAKERS 100.0%
0.0%
0.0%
0.0%
0.0%
40
689 INSPECTORS, TESTERS, AND GRADERS 100.0%
0.0%
0.0%
0.0%
0.0%
13
696 STATIONARY ENGINEERS 100.0%
0.0%
0.0%
0.0%
0.0%
3
704 LATHE AND TURNING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
3
707 ROLLING MACHINE OPERATORS 74.5%
0.0%
0.0%
0.0%
25.5%
125
715 MISCELLANEOUS METAL, PLASTIC, STONE, AND GLASS WORKING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
24
724 HEAT TREATING EQUIPMENT OPERATORS 83.3%
0.0%
0.0%
0.0%
16.7%
48
727 SAWING MACHINE OPERATORS 0.0%
0.0%
0.0%
0.0%
100.0%
3
756 MIXING AND BLENDING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
21
757 SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS 92.0%
0.0%
0.0%
0.0%
8.0%
133
758 COMPRESSING AND COMPACTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
13
766 FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD 100.0%
0.0%
0.0%
0.0%
0.0%
24
768 CRUSHING AND GRINDING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
5
769 SLICING AND CUTTING MACHINE OPERATORS 0.0%
0.0%
0.0%
0.0%
100.0%
13
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
13
779 MACHINE OPERATORS, NOT SPECIFIED 64.3%
0.0%
0.0%
0.0%
35.7%
37
783 WELDERS AND CUTTERS 100.0%
0.0%
0.0%
0.0%
0.0%
19
785 ASSEMBLERS 100.0%
0.0%
0.0%
0.0%
0.0%
117
796 PRODUCTION INSPECTORS, CHECKERS, AND EXAMINERS 100.0%
0.0%
0.0%
0.0%
0.0%
69
797 PRODUCTION TESTERS 100.0%
0.0%
0.0%
0.0%
0.0%
21
798 PRODUCTION SAMPLERS AND WEIGHERS 100.0%
0.0%
0.0%
0.0%
0.0%
8
804 TRUCK DRIVERS, HEAVY 100.0%
0.0%
0.0%
0.0%
0.0%
5
849 CRANE AND TOWER OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
51
856 INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
21
859 MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
16
873 PRODUCTION HELPERS 100.0%
0.0%
0.0%
0.0%
0.0%
72
883 FREIGHT, STOCK, AND MATERIAL MOVERS, HAND, N.E.C. 100.0%
0.0%
0.0%
0.0%
0.0%
85
889 LABORERS, EXCEPT CONSTRUCTION 86.4%
0.0%
0.0%
0.0%
13.6%
117
SUBTOTAL 95.4%
0.0%
0.0%
0.0%
4.5%
2,529
MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
216 ENGINEERING TECHNICIANS, N.E.C. 0.0%
0.0%
75.0%
25.0%
0.0%
45
723 METAL PLATING MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
28
734 PRINTING MACHINE OPERATORS 100.0%
0.0%
0.0%
0.0%
0.0%
46
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.0%
0.0%
66.7%
33.3%
0.0%
574
SUBTOTAL 6.6%
0.0%
60.1%
33.2%
0.0%
693
ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
723 METAL PLATING MACHINE OPERATORS 0.0%
0.0%
60.0%
40.0%
0.0%
57
SUBTOTAL 0.0%
0.0%
60.0%
40.0%
0.0%
57
TRANSPORTATION EQUIPMENT (SIC 37)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
216 ENGINEERING TECHNICIANS, N.E.C. 0.0%
0.0%
66.7%
33.3%
0.0%
17
706 PUNCHING AND STAMPING PRESS MACHINE OPERATORS 0.0%
0.0%
0.0%
100.0%
0.0%
3
777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 0.0%
0.0%
0.0%
50.0%
50.0%
85
SUBTOTAL 0.0%
0.0%
10.7%
48.7%
40.4%
105
HEALTH SERVICES (SIC 80)
Code Occupation Description (1980) No
Control
Resp
Prot
Other
PPE

Vent
Other
Control

Exposures
446 HEALTH AIDES, EXCEPT NURSING 0.0%
0.0%
0.0%
100.0%
0.0%
407
SUBTOTAL 0.0%
0.0%
0.0%
100.0%
0.0%
407
TOTAL 54.1%
0.0%
20.9%
15.3%
9.4%
4,926
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.

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