Class Code 4512
Biomedical Research Laboratories
Class code 4512 applies to biomedical research laboratories — the bench and facility work where scientists and technicians perform experimental biological research. The California pure premium rate for 4512 is $0.172 per $100 of payroll, a low base reflecting lower frequency but specialized severity risks. Understanding this classification helps employers control exposures, maintain compliance, and manage workers' comp costs.
What Class Code 4512 Covers
This classification covers laboratory operations devoted to biomedical research: molecular biology, cell and tissue culture, microbiology, virology, recombinant DNA work, small‑scale translational experiments, and associated benchwork. Included are activities such as preparing reagents, handling biological specimens, running assays, operating centrifuges and autoclaves, working in biosafety cabinets, and maintaining laboratory equipment and cold storage. It generally applies to research labs in biotech firms, university and institutional research groups, contract research organizations (CROs), and government research centers where work is investigational rather than routine clinical diagnostics. Routine clinical testing labs or large commercial diagnostic operations may be classified differently; class 4512 is focused on experimental and investigational laboratory research.
Who It Applies To
- Academic research laboratories (university principal investigators and lab staff)
- Biotech and pharmaceutical R&D bench scientists and lab technicians
- Contract Research Organizations (CROs) conducting preclinical lab studies
- Government or nonprofit biomedical research institutes and staff
- Laboratory managers, research associates, and lab support personnel
Common Job Duties
- Preparing and dispensing reagents, media, and buffers
- Cell culture and tissue handling (aseptic technique in biosafety cabinets)
- Pipetting, microscopy, and running molecular assays (PCR, western blots)
- Operating centrifuges, autoclaves, freezers, and incubators
- Collecting, labeling, and temporarily storing biological specimens
- Decontaminating work surfaces, autoclaving waste, and managing sharps
- Maintaining lab records, inventory, and instrument calibration
Common Injury Risks
Understanding the $0.172 Rate
The pure premium rate of $0.172 per $100 payroll represents the estimated cost of future claim payments per $100 of payroll before insurer expenses and adjustments. To compute the base premium, divide total payroll by 100 and multiply by 0.172; carriers then apply an experience modification, policy-related charges, state assessments, and any PEO or insurer credits. Final employer cost is affected by actual loss history, payroll mix, classification accuracy, deductible choices, and safety program performance.
Cal/OSHA Compliance Requirements
Biomedical research labs must follow Cal/OSHA requirements such as the Bloodborne Pathogens standard (Title 8, §5193) — including an exposure control plan, offered hepatitis B vaccination, post‑exposure evaluation, and training — and Hazard Communication (Title 8, §5194) for chemical safety and SDS access. Labs must also implement engineering controls (biosafety cabinets, autoclaves), appropriate PPE, respiratory protection when indicated, sharps handling procedures, and maintain training and medical surveillance records consistent with biosafety level practices.
How Key HR Helps Employers Under Class Code 4512
A PEO like Key HR helps employers with class code accuracy, centralized payroll reporting, and claims management to avoid misclassification and surprise audits. Key HR can implement or audit lab‑specific safety programs (bloodborne pathogen plans, chemical hygiene), deliver required training, coordinate post‑exposure medical care, and run return‑to‑work programs — all of which lower indemnity and medical costs and improve your workers' comp experience rating.
Get a QuoteFrequently Asked Questions
Does class code 4512 cover labs that work with animals for biomedical research?
Yes — when animal work is part of experimental biomedical research performed by lab staff (e.g., vivarium procedures tied to bench studies), those activities are typically included under 4512. Purely animal boarding, grooming, or nonresearch animal husbandry would generally be classified differently.
What steps most reduce workers' comp costs for a biomedical research lab?
Key steps are strict adherence to an exposure control plan, comprehensive bloodborne pathogen and chemical training, engineering controls (BSCs, sealed centrifuge rotors), documented post‑exposure procedures, active return‑to‑work policies, and accurate payroll and classification reporting to prevent rate misapplication.
What Cal/OSHA training and documentation are required for lab employees?
Required items include bloodborne pathogen training and an exposure control plan, hazard communication and SDS access, task‑specific PPE training, documentation of vaccinations or declination, annual refresher training as applicable, and records of incident investigations and medical follow‑ups.
Quick Facts
- Class Code
- 4512
- Classification
- Biomedical Research Laboratories
- Pure Premium Rate
- $0.172 / $100 payroll
- Effective Date
- September 1, 2026
- Source
- WCIRB Approved Filing
Manage Workers' Comp Through a PEO
Key HR provides pay-as-you-go workers' comp for California employers — no large deposits, no audits, better rates.
Get a Quoteor call (800) 922-4133Ready to Simplify Workers' Comp for Class Code 4512?
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