General Industry (29 CFR 1910)

Formaldehyde

Verified vs OSHA sources · 2026-10-05

29 CFR 1910.1048

29 CFR 1910.1048 protects general-industry workers from formaldehyde, both a carcinogen and a respiratory and skin sensitizer, with a 0.75 ppm 8-hour TWA, a 2 ppm STEL, and a 0.5 ppm action level. Exposure often comes from formalin solutions and resins, not just pure gas.

29 CFR 1910.1048 at a glance

PEL: 0.75 ppm as an 8-hour TWA (29 CFR 1910.1048(c)(1))
STEL: 2 ppm over any 15-minute period (1910.1048(c)(2))
Action level: 0.5 ppm (8-hr TWA): triggers monitoring and medical surveillance
Health effect: Formaldehyde is a carcinogen and a potent respiratory and skin sensitizer
Max penalty (2026): $16,550 per serious violation; $165,514 per willful
The #1 confusion: It is both a cancer hazard and a sensitizer, and it off-gasses from solutions and resins, not just pure gas

What 29 CFR 1910.1048 requires (plain English)

29 CFR 1910.1048 protects general-industry workers from formaldehyde, a pungent gas that is both a carcinogen and a strong sensitizer of the skin and respiratory tract. The standard sets a permissible exposure limit of 0.75 ppm as an 8-hour time-weighted average, a short-term exposure limit of 2 ppm over any 15 minutes, and an action level of 0.5 ppm.

Formaldehyde exposure occurs in anatomy and pathology labs and mortuaries (from formalin), in producing and using resins for particleboard and plywood, in textile finishing, foundries, and salons. Employers must monitor exposures, control them primarily with engineering and work-practice controls (ventilation and enclosure), establish regulated areas where exposure exceeds the TWA or STEL, provide respirators where controls are not sufficient, and supply protective equipment against skin and eye contact.

Because formaldehyde is a sensitizer, the standard requires medical surveillance for workers exposed at or above the action level or STEL, including a medical questionnaire and evaluation for respiratory and skin sensitization, plus prompt evaluation after significant skin or respiratory reactions. Hazard information, annual training, and 30-year recordkeeping (1910.1020) apply. The health hazards it warns of feed directly into the chemical's Safety Data Sheet and HazCom labeling.

The regulatory text

“The employer shall assure that no employee is exposed to an airborne concentration of formaldehyde which exceeds 0.75 parts formaldehyde per million parts of air (0.75 ppm) as an 8-hour TWA.”

29 CFR 1910.1048(c)(1)

Key facts about 29 CFR 1910.1048

The formaldehyde PEL is 0.75 ppm as an 8-hour TWA (1910.1048(c)(1)).
A short-term exposure limit caps exposure at 2 ppm over any 15 minutes (1910.1048(c)(2)).
The action level is 0.5 ppm (8-hr TWA) and triggers monitoring and medical surveillance.
Formaldehyde is both a carcinogen and a potent respiratory and skin sensitizer.
It off-gasses from formalin solutions and from resins in particleboard and plywood, not only as a pure gas.
Medical surveillance is triggered at the action level or the STEL and screens for sensitization (1910.1048(l)).
Annual training is required for exposed workers, and records are kept for employment plus 30 years.

Scope: who 29 CFR 1910.1048 applies to

Regulatory framework: General Industry (29 CFR 1910)
Citation reference: 29 CFR 1910.1048
Enforcement status: In force and enforced
Jurisdiction: Federal OSHA (29 State-Plan jurisdictions may be stricter)

State-Plan states (e.g. California, Washington, Michigan) operate OSHA-approved programs that must be at least as effective as federal OSHA and frequently impose higher penalties or additional requirements. Confirm the rule as adopted in your state.

Key requirements of 29 CFR 1910.1048

#	Employer obligation
1	Limit exposure to 0.75 ppm PEL
2	STEL of 2 ppm (15-minute)
3	Monitor exposure above action level (0.5 ppm)
4	Provide medical surveillance for sensitized workers
5	Establish regulated areas above PEL/STEL
6	Label formaldehyde-containing materials

Summarized from the text of 29 CFR 1910.1048. Always read the full regulation for the binding language.

Common Formaldehyde violations

Deficiencies OSHA cites under 29 CFR 1910.1048 include the ones below, in no particular order. Distinct deficiencies can be cited as separate items, and each serious item carries up to $16,550 (2026). Broader per-instance stacking exists but is a discretionary, case-by-case OSHA enforcement policy, not an automatic multiplier.

No exposure monitoring where formaldehyde or formalin is used above the action level (1910.1048(d)).
Exposures above the PEL or STEL without adequate engineering controls (1910.1048(f)).
No medical surveillance for workers at or above the action level or STEL (1910.1048(l)).
No regulated area or hazard signs where exposure exceeds the TWA or STEL (1910.1048(e)).
No annual training for employees exposed to formaldehyde (1910.1048(n)).

Formaldehyde is a carcinogen AND a sensitizer, and much of it comes from solutions and resins

Two things get overlooked. First, formaldehyde carries two distinct hazards: it is a carcinogen and a sensitizer, meaning that after becoming sensitized a worker can react severely to tiny concentrations, so controlling for cancer risk alone misses the allergic-reaction hazard the medical surveillance is designed to catch. Second, exposure is not limited to handling pure formaldehyde gas: formalin solutions used to preserve specimens, and urea- and phenol-formaldehyde resins in particleboard, plywood, and textiles, continuously off-gas the vapor. A lab or woodshop can exceed the 0.75 ppm PEL or the 2 ppm STEL without anyone opening a bottle labeled 'formaldehyde.'

What OSHA inspectors look for

A compliance officer checks monitoring against the TWA and STEL, whether resin and formalin sources were assessed (not just pure formaldehyde), regulated areas where limits are exceeded, and medical surveillance screening for sensitization above the action level or STEL. Overlooking off-gassing from particleboard or preserved specimens is a common gap.

Example: how a violation is cited

An anatomy lab uses formalin to preserve specimens with no ventilation assessment, and staff exceed the 0.75 ppm PEL from off-gassing. OSHA cites 1910.1048 for the overexposure and missing controls: an exposure with no open bottle of 'formaldehyde' in sight, with penalties from $16,550.

Illustrative example, not a specific OSHA case.

Formaldehyde compliance checklist

Use this to evaluate your compliance with 29 CFR 1910.1048. Each item is a key requirement OSHA may verify during an inspection.

Identify formaldehyde and formalin sources, including resin off-gassing, and monitor for both the TWA and STEL.
Reduce exposure to the 0.75 ppm PEL and 2 ppm STEL primarily with ventilation and enclosure.
Establish regulated areas and hazard signs where exposure exceeds the TWA or STEL.
Provide medical surveillance, screening for sensitization, for workers at or above the 0.5 ppm action level or the STEL.
Provide respirators where controls are insufficient and PPE against skin and eye contact.
Train exposed workers annually and keep exposure and medical records for employment plus 30 years.

2026 penalties for 29 CFR 1910.1048

Maximums set by 29 CFR 1903.15(d). 2026 amounts unchanged from 2025 (no CPI adjustment; OMB M-26-11). Not an increase. The 2025 OSHA penalty levels remain in effect for 2026; OSHA made no inflation adjustment for 2026. 29 CFR 1903.15 identifies January 15, 2025 as the effective reference for these amounts, while OSHA's public penalties page currently references penalties assessed after Jan. 15, 2026.

Violation type	Minimum	Maximum	When it applies
Serious	$1,085	$16,550	Substantial probability of death or serious physical harm.
Other-Than-Serious	$0	$16,550	Relates to safety/health but unlikely to cause death or serious harm.
Willful	$11,823	$165,514	Intentional, knowing, or voluntary disregard of the requirement.
Repeated	$4,256	$165,514	A substantially similar violation cited within the last 5 years.
Failure to Abate	None	$16,550/day	up to $16,550 per day; total capped at 30x the daily amount (FOM Ch.6)

Formaldehyde citations follow health inspections in labs, mortuaries, and wood-products plants. Serious violations reach $16,550 and willful or repeat violations $165,514; unassessed off-gassing and missing sensitization surveillance are common findings.

Maximums and the willful minimum are set by 29 CFR 1903.15(d); the serious and repeated minimums are OSHA policy floors from its annual penalty adjustment memo. OSHA applies gravity-based and size, good-faith and history reductions (FOM CPL 02-00-164 Ch.6). Estimates only, not legal advice.

The business case for Formaldehyde compliance

Formaldehyde is both a carcinogen and a sensitizer, so after sensitization a worker can react severely to tiny concentrations: a hazard that controlling for cancer risk alone would miss. Because much of the exposure off-gasses from solutions and resins, labs and woodshops can exceed the 0.75 ppm PEL without handling pure gas.

Free compliance tools for 29 CFR 1910.1048

SDS Gap Analyzer PPE Selector Respiratory Protection Program Builder

Formaldehyde penalties by state

Penalties and enforcement vary by state. State-Plan states may impose higher penalties and additional requirements beyond federal 29 CFR 1910.1048.

Alabama Arkansas Colorado Connecticut Delaware District of Columbia

View all 50 states + DC →

Frequently asked questions about 29 CFR 1910.1048

What are the OSHA exposure limits for formaldehyde?

Under 1910.1048(c), formaldehyde has a permissible exposure limit of 0.75 ppm as an 8-hour time-weighted average and a short-term exposure limit of 2 ppm over any 15-minute period. An action level of 0.5 ppm (8-hour TWA) triggers exposure monitoring and medical-surveillance obligations.

Why is formaldehyde both a carcinogen and a sensitizer?

Formaldehyde carries two independent health hazards. As a carcinogen it is linked to nasopharyngeal cancer and leukemia; as a sensitizer it can make a worker allergically reactive, so that after sensitization even very low concentrations provoke asthma-like respiratory or skin reactions. The 1910.1048 medical-surveillance program screens specifically for sensitization, which controlling for cancer risk alone would miss.

Where does formaldehyde exposure come from if we don't use pure gas?

Most workplace exposure is from solutions and resins, not pure gas. Formalin (a formaldehyde-in-water solution) used to preserve anatomy and pathology specimens off-gasses continuously, and urea- and phenol-formaldehyde resins in particleboard, plywood, and textile finishes release vapor over time. A lab or woodshop can exceed the 0.75 ppm PEL or 2 ppm STEL without handling a bottle labeled formaldehyde.

When is formaldehyde medical surveillance required?

Under 1910.1048(l), medical surveillance must be made available to employees exposed at or above the 0.5 ppm action level or the 2 ppm short-term exposure limit, and to any worker who develops signs and symptoms of overexposure. It begins with a medical disease questionnaire and includes evaluation for respiratory and skin sensitization, with examinations as indicated.

Regulatory history of 29 CFR 1910.1048

OSHA issued the formaldehyde standard in 1987 (52 FR 46168) and lowered the PEL to 0.75 ppm with a 2 ppm STEL in 1992 (57 FR 22290) after formaldehyde's classification as a probable, later known, human carcinogen. The medical-surveillance and sensitization provisions reflect its dual carcinogen-and-sensitizer hazard.

Related glossary terms

Key terms that appear in 29 CFR 1910.1048, each with a full plain-English explainer.

Formaldehyde Permissible Exposure Limit (PEL)Action Level Medical Surveillance Safety Data Sheet (SDS)Respiratory Protection Program

Related guides & articles

Workplace Chemical Exposure Limits: PEL vs TLV OSHA Chemical Storage Requirements Complete Guide

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29 CFR 1910.1000

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29 CFR 1910.1001

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29 CFR 1910.1003

OSHA 13 Carcinogens

29 CFR 1910.1018

Inorganic Arsenic

Primary sources

OSHA figures on this page are imported from HazComFast's verified regulatory module (verified 2026-10-05 against eCFR, OSHA.gov, and the Federal Register).

This page is an educational summary, not legal advice. OSHA standards and penalty amounts change; confirm requirements against the current regulation and your applicable State-Plan before acting.

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