| Agent Name | ZIRCON |
| CAS # | 14940-68-2 |
| RTECS # | ZH9000000 |
| Agent Code | X6423 |
| Code | Occupation Description (1980) | Total # Employees (Male & Female) |
Total # Female Employees |
| 105 | THERAPISTS, N.E.C. | 219 | 219 |
| 216 | ENGINEERING TECHNICIANS, N.E.C. | 44 | 44 |
| 364 | TRAFFIC, SHIPPING, AND RECEIVING CLERKS | 178 | |
| 365 | STOCK AND INVENTORY CLERKS | 710 | 516 |
| 453 | JANITORS AND CLEANERS | 1,484 | 892 |
| 518 | INDUSTRIAL MACHINERY REPAIRERS | 159 | |
| 544 | MILLWRIGHTS | 153 | |
| 633 | SUPERVISORS, PRODUCTION OCCUPATIONS | 22 | |
| 643 | BOILERMAKERS | 6,423 | |
| 675 | HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS | 737 | |
| 719 | MOLDING AND CASTING MACHINE OPERATORS | 1,604 | 30 |
| 725 | MISCELLANEOUS METAL AND PLASTIC PROCESSING MACHINE OPERATORS | 45 | |
| 757 | SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS | 3,241 | |
| 759 | PAINTING AND PAINT SPRAYING MACHINE OPERATORS | 267 | 44 |
| 766 | FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD | 4,017 | |
| 768 | CRUSHING AND GRINDING MACHINE OPERATORS | 95 | 8 |
| 777 | MISCELLANEOUS MACHINE OPERATORS, N.E.C. | 389 | |
| 779 | MACHINE OPERATORS, NOT SPECIFIED | 233 | |
| 783 | WELDERS AND CUTTERS | 679 | 12 |
| 785 | ASSEMBLERS | 1,255 | |
| 849 | CRANE AND TOWER OPERATORS | 154 | |
| 856 | INDUSTRIAL TRUCK AND TRACTOR EQUIPMENT OPERATORS | 178 | |
| 859 | MISCELLANEOUS MATERIAL MOVING EQUIPMENT OPERATORS | 578 | 445 |
| 878 | MACHINE FEEDERS AND OFFBEARERS | 311 | 178 |
| 887 | VEHICLE WASHERS AND EQUIPMENT CLEANERS | 89 | |
| 889 | LABORERS, EXCEPT CONSTRUCTION | 4,449 | 351 |
| TOTAL | 27,712 | 2,739 | |
*(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.