| Agent Name | HYDROQUINONE, TERT-BUTYL- |
| CAS # | 1948-33-0 |
| RTECS # | MX4375000 |
| Agent Code | X7157 |
| Code | Occupation Description (1980) | Total # Employees (Male & Female) |
Total # Female Employees |
| 044 | AEROSPACE ENGINEERS | 22 | |
| 059 | ENGINEERS, N.E.C. | 83 | 83 |
| 073 | CHEMISTS, EXCEPT BIOCHEMISTS | 233 | |
| 203 | CLINICAL LABORATORY TECHNOLOGISTS AND TECHNICIANS | 348 | 292 |
| 208 | HEALTH TECHNOLOGISTS AND TECHNICIANS, N.E.C. | 288 | 213 |
| 213 | ELECTRICAL AND ELECTRONIC TECHNICIANS | 44 | |
| 225 | SCIENCE TECHNICIANS, N.E.C. | 1,185 | 474 |
| 453 | JANITORS AND CLEANERS | 150 | |
| 633 | SUPERVISORS, PRODUCTION OCCUPATIONS | 1,185 | |
| 637 | MACHINISTS | 3,714 | 1,382 |
| 687 | BAKERS | 2,308 | 287 |
| 689 | INSPECTORS, TESTERS, AND GRADERS | 72 | |
| 755 | EXTRUDING AND FORMING MACHINE OPERATORS | 92 | |
| 756 | MIXING AND BLENDING MACHINE OPERATORS | 1,004 | |
| 757 | SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS | 225 | |
| 759 | PAINTING AND PAINT SPRAYING MACHINE OPERATORS | 211 | |
| 769 | SLICING AND CUTTING MACHINE OPERATORS | 1,197 | |
| 774 | PHOTOGRAPHIC PROCESS MACHINE OPERATORS | 17 | 12 |
| 777 | MISCELLANEOUS MACHINE OPERATORS, N.E.C. | 843 | 380 |
| 888 | HAND PACKERS AND PACKAGERS | 1,005 | 542 |
| 889 | LABORERS, EXCEPT CONSTRUCTION | 3,942 | 22 |
| TOTAL | 18,166 | 3,687 | |
*(1) The estimates for each occupation apply across the surveyed industries in which the agent was observed. Not all industries were surveyed, and not all agents were observed in all surveyed industries. (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.