OSHA’s rules for worker exposure to corrosive materials layer four duties on the employer: tell workers what the chemical is and how it can hurt them, engineer the hazard out of the work wherever feasible, supply protective equipment matched to the specific substance, and place emergency eyewash and drenching facilities within immediate reach of any spot where eyes or skin could be exposed. The anchor regulation is 29 CFR 1910.151(c), but it sits inside a wider set of standards on hazard communication, control of exposure, personal protective equipment, injury recordkeeping, and worker rights. Ignoring any one of them can draw a penalty above $165,000 per violation.
What Counts as a Corrosive
Under OSHA’s Hazard Communication Standard, a chemical is a skin corrosive when it destroys tissue down through the dermis, the layer beneath the outer skin, within four hours of contact. That puts it in Category 1, which is split into three subcategories based on how quickly the damage occurs, but all three carry the same regulatory weight and trigger the same employer obligations.1Occupational Safety and Health Administration. Appendix A to 1910.1200 – Health Hazard Criteria (Mandatory)
Corrosivity tracks with extreme pH. Strong acids like sulfuric, hydrochloric, and nitric acid sit at the low end; strong bases like sodium hydroxide and potassium hydroxide sit at the high end. Both break down organic tissue quickly. The GHS classification also recognizes a separate hazard class for chemicals that corrode metals, which matters for container integrity and storage.
Inhalation is an easy route to overlook. Corrosive vapors and mists can damage the respiratory tract as effectively as liquids damage skin. Heated acid baths produce fumes that are themselves corrosive, and OSHA’s respiratory protection standard requires the employer to supply respirators whenever engineering controls cannot bring airborne concentrations to a safe level.2eCFR. 29 CFR 1910.134 – Respiratory Protection
Hazard Communication: Labels, SDSs, and Training
Every employer whose workers may be exposed to a corrosive chemical must build and maintain a written hazard communication program under 29 CFR 1910.1200. The program has to include a list of every hazardous chemical in the workplace, tied to the product identifiers on the Safety Data Sheets, and it must explain how workers will be informed about hazards from non-routine tasks and from chemicals in unlabeled pipes.3eCFR. 29 CFR 1910.1200 – Hazard Communication
Safety Data Sheets for every corrosive substance must be accessible to workers at all times. An employer cannot lock them in an office or require supervisor approval to see them.
Every container of a corrosive chemical must carry a label with the GHS-required elements: the product identifier matching the SDS, the signal word (for corrosives, “Danger”), hazard statements such as “causes severe skin burns and eye damage,” the corrosion pictogram, and precautionary statements covering handling, storage, and emergency response. Shipped containers must show all of these. Workplace containers that stay on-site can use a simplified label, but it still must show the product identifier and enough hazard information that, combined with the SDS, workers understand the risks.4Occupational Safety and Health Administration. 1910.1200 – Hazard Communication
Training rounds it out. Workers have to receive effective instruction on how to read labels and SDSs, on the specific corrosives in their work area, and on the protective measures available to them. That training must happen before the worker’s first exposure, and again whenever a new corrosive hazard is introduced.
Controlling the Hazard Before Reaching for PPE
OSHA’s longstanding policy is that engineering and administrative controls have to be the primary way of reducing exposure, as far as feasible. PPE is the last line, not a substitute for fixing the workplace.5Occupational Safety and Health Administration. Chemical Hazards and Toxic Substances – Controlling Exposure The five-level hierarchy the agency uses runs from most to least effective:
- Elimination. Remove the corrosive from the process entirely. If a cleaning task can be done without acid, stop using acid.
- Substitution. Replace a highly corrosive chemical with a less dangerous alternative, such as swapping a concentrated acid for a milder formulation.
- Engineering controls. Build physical changes into the workplace: enclosed systems that eliminate direct handling, fume hoods and local exhaust ventilation that capture vapors at the source, and splash guards around open tanks.
- Administrative controls. Change how the work is organized. Rotate workers to limit exposure time, restrict access to areas where corrosives are used, post clear signage, and write standard operating procedures.
- Personal protective equipment. Used only when the controls above cannot get risk down to a safe level on their own.
Personal Protective Equipment
Before issuing any gear, the employer has to perform a written hazard assessment identifying the specific corrosive chemicals present, the routes of exposure (skin, eyes, inhalation), and the equipment that will actually protect against those chemicals. The employer must then provide the selected PPE at no cost to the worker.6eCFR. 29 CFR 1910.132 – General Requirements for PPE
For corrosive work, that typically means chemical-resistant gloves rated for the specific substance, non-vented splash goggles or a full face shield, chemical-resistant aprons or suits, and respiratory protection where vapors or mists are present. Material compatibility is the critical detail. A glove that resists sulfuric acid may dissolve on contact with an organic solvent, so the SDS for each chemical is what tells you which materials will hold up.7Occupational Safety and Health Administration. Semiconductors – Toxic, Irritative, and Corrosive Gases and Liquids
Employers also have to replace worn or damaged PPE and train workers on how to put equipment on and take it off without contaminating themselves in the process.
Emergency Eyewash and Safety Showers
The core federal rule is short. 29 CFR 1910.151(c) states that where any person’s eyes or body may be exposed to injurious corrosive materials, suitable facilities for quick drenching or flushing must be provided within the work area for immediate emergency use.8eCFR. 29 CFR 1910.151 – Medical Services and First Aid
The regulation does not define “suitable” or “quick.” OSHA fills that gap by pointing employers to ANSI Z358.1, which the agency has not adopted as a mandatory rule but treats as the best available guidance for meeting 1910.151(c).9Occupational Safety and Health Administration. ANSI Z358.1 Guidance for Complying With 1910.151(c) Citation Policy Inspectors use the ANSI benchmarks when they evaluate compliance, so ignoring them carries real enforcement risk. Those benchmarks include:
- Location within 10 seconds of travel from any point where corrosive exposure could occur, with the path clear of obstructions.
- Tepid water, defined as between 60°F and 100°F, so the flush does not add scalding or hypothermia to the injury.
- Continuous delivery for at least 15 minutes.
- An eyewash flow rate of at least 0.4 gallons per minute (1.5 liters per minute).
- Single-motion activation that stays hands-free, so a blinded or injured worker can use the station without help.
The ANSI standard also calls for weekly activation of every unit to confirm operation and flush stagnant water, plus an annual inspection confirming the equipment can deliver tepid water for a full 15 minutes.10Occupational Safety and Health Administration. Where Are Eyewash Stations Used (OSHA InfoSheet) Keep written logs. During an OSHA inspection, the maintenance record is often the first thing reviewed, and missing logs read as missing maintenance.
Recording and Reporting Corrosive Exposures
When a worker is injured by a corrosive, the employer may have to record the incident on the OSHA 300 Log. An injury is recordable if it results in death, days away from work, restricted duties or job transfer, medical treatment beyond first aid, loss of consciousness, or a significant injury or illness diagnosed by a licensed healthcare professional. Chemical burns from corrosives almost always meet at least one of these criteria; even a relatively minor splash that requires medical flushing beyond basic first aid triggers a recording obligation. The employer has seven calendar days after receiving information about the case to determine recordability.11eCFR. 29 CFR Part 1904 – Recording and Reporting Occupational Injuries and Illnesses
Reporting to OSHA is separate from the 300 Log. Fatalities must be reported within 8 hours. Hospitalizations, amputations, and losses of an eye must be reported within 24 hours. A severe corrosive burn that sends someone to the hospital starts that 24-hour clock.
Penalties
OSHA adjusts its maximum penalties each year for inflation. As of the adjustment effective January 15, 2025, the caps are:
- Serious or other-than-serious violation: up to $16,550 per violation.
- Failure to abate: up to $16,550 per day beyond the abatement deadline.
- Willful or repeated violation: up to $165,514 per violation.
A missing eyewash station near an acid bath would likely draw a serious citation. An employer who ignores a prior citation and still has not installed one can face a willful or repeated violation, pushing the penalty above $165,000 for a single piece of equipment.12Occupational Safety and Health Administration. OSHA Penalties States that run their own OSHA-approved programs must keep penalties at least as effective as the federal amounts, and some set them higher.
Your Rights as a Worker
You can file a complaint with OSHA at any time about a hazardous condition — a broken eyewash station, missing labels, no training on a chemical you handle — and the complaint can be confidential.
In extreme situations you may have the right to refuse dangerous work. That right applies only when all of the following are true: you have asked the employer to fix the hazard and they have not done so, you genuinely believe an imminent danger of death or serious injury exists, a reasonable person would agree the danger is real, and there is not enough time to get it corrected through a normal OSHA inspection. If your employer retaliates against you for exercising any of these rights, you have 30 days to file a retaliation complaint with OSHA.13Occupational Safety and Health Administration. Workers’ Right to Refuse Dangerous Work