The use of formalin in cadaver preservation is a long-standing practice in both forensic medicine and the funeral industry. However, a growing body of scientific evidence and documented case studies now calls for a reassessment of this substance due to significant occupational health and safety concerns.
The InvoCare Case: Operational Issues and Risk Management Gaps
In 2023, an investigation in New Zealand revealed that embalming staff at facilities operated by InvoCare—the country’s largest funeral service provider—were exposed to formaldehyde concentrations well above recommended limits. WorkSafe New Zealand had already issued a formal improvement notice in 2021, requiring the company to implement systematic health monitoring and appropriate personal protective equipment. Nevertheless, internal reports later confirmed ongoing issues, such as the absence of regular medical assessments and the use of non-compliant protective masks.
Epidemiological Evidence from the United States
A study by the U.S. National Cancer Institute confirmed a significantly increased risk of acute myeloid leukemia among embalmers with over 20 years of professional experience. Longitudinal cohort analyses demonstrated a direct correlation between cumulative formaldehyde exposure and the incidence of hematologic malignancies.
Molecular Damage Linked to Chronic Exposure
Further research has identified chromosomal abnormalities in the bone marrow cells of exposed workers, confirming formaldehyde’s mutagenic potential. These findings are consistent with its classification as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC).
A Safer Path Forward: Sector Responsibility and Innovation
Given the current state of scientific knowledge, there is a clear need for the forensic and funeral sectors to adopt safer and more modern preservation practices. Less toxic chemical alternatives and temporary preservation technologies are now available, offering effective solutions that substantially reduce exposure risks for workers.
Transitioning away from formalin is not only a matter of regulatory and health compliance—it is also an opportunity to strengthen the industry’s ethical standards and long-term sustainability.
Further reading on the InvoCare case:
🔗 RNZ Investigation – Mortuary workers exposed to dangerous levels of formaldehyde