The Right to Know: Chemical Safety and Hazard Communication for Theater Technicians
The performing arts environment is, chemically speaking, one of the most complex and hazardous workplaces in any industry. A single production may involve dozens of chemical products: scenic paints and coatings, adhesives and solvents, welding gases and flux, flame retardant treatments, pyrotechnic materials, fog fluids, cleaning agents, fabric dyes, latex products, and specialized materials for prop and costume construction. Each of these chemicals carries specific hazards. Each requires specific handling, storage, and disposal procedures. And every technician who works with or around any of them has a legal right to know exactly what those hazards are.
That right: the “Right to Know”: is codified in federal law through OSHA’s Hazard Communication Standard (HCS), 29 CFR 1910.1200. This standard is one of the most significant occupational safety regulations in U.S. history, and full compliance with it is not optional for any theater operation that uses chemical substances. Understanding its requirements, and developing the skills to work within them, is a core competency for every professional theater technician.
Understanding OSHA’s Hazard Communication Standard
OSHA’s Hazard Communication Standard was first promulgated in 1983 and has been updated several times since, most significantly in 2012 when it was aligned with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). The current standard, found at 29 CFR 1910.1200, applies to virtually every workplace where hazardous chemicals are present: which includes every theater that uses paint, solvents, adhesives, cleaning products, or any other chemical substance.
The HCS is built on a simple but powerful premise: workers cannot protect themselves from chemical hazards they do not know about. The standard therefore creates a comprehensive information chain: chemical manufacturers must assess their products and communicate the hazards on the label and in a Safety Data Sheet (SDS); employers must obtain and maintain those SDSs and make them accessible to workers; and employers must train workers to understand the information and use it to protect themselves.
The HCS requires employers to maintain a written Hazard Communication Program: a document that describes how the organization complies with each element of the standard. This program must identify all hazardous chemicals in the workplace, describe how SDSs are maintained and accessed, explain the labeling system in use, and document training. In a theater, this program must cover chemicals in the scene shop, costume shop, prop shop, electrical department, and any other area where chemicals are used or stored.
Safety Data Sheets: The 16-Section Information System
The Safety Data Sheet (SDS) is the primary document through which chemical hazard information is communicated. Under the GHS-aligned HCS, all SDSs must follow a standardized 16-section format, making it possible to find specific information in a predictable location regardless of who manufactured the chemical.
The 16 sections are: (1) Identification, (2) Hazard Identification, (3) Composition/Information on Ingredients, (4) First-Aid Measures, (5) Fire-Fighting Measures, (6) Accidental Release Measures, (7) Handling and Storage, (8) Exposure Controls/Personal Protection, (9) Physical and Chemical Properties, (10) Stability and Reactivity, (11) Toxicological Information, (12) Ecological Information, (13) Disposal Considerations, (14) Transport Information, (15) Regulatory Information, and (16) Other Information.
For theater technicians, the sections of most immediate practical importance are Section 2 (which tells you what hazards the chemical poses), Section 4 (what to do if someone is exposed), Section 7 (how to handle and store it safely), Section 8 (what PPE is required), and Section 13 (how to dispose of it legally). Technicians must be trained to locate and read each of these sections and to act on the information they contain.
SDSs must be kept current and accessible. Under the HCS, employers must maintain an SDS for each hazardous chemical in the workplace and must ensure that workers can access those SDSs during their shifts. In modern practice, this often means a digital SDS management system with an online database, but paper binders in each shop area remain acceptable if they are kept current. An SDS that is ten years old for a product that has been reformulated is not compliant and is potentially dangerous.
GHS Labeling: Reading the Container Before You Open It
Under GHS, hazardous chemical containers must carry a standardized label that includes six key elements: a product identifier (the chemical name or product name); a signal word (“Danger” or “Warning”); hazard statements describing the nature and severity of the hazard; precautionary statements describing protective measures and first aid; a supplier identification; and pictograms: the distinctive red-bordered diamond symbols that communicate hazard categories at a glance.
Theater technicians must be trained to recognize and interpret GHS pictograms. The skull and crossbones indicates acute toxicity. The flame symbol indicates flammable materials. The exclamation mark indicates irritants, sensitizers, and less severe toxic materials. The health hazard diamond indicates carcinogens, respiratory sensitizers, reproductive toxins, and other serious chronic health hazards. The corroding surface indicates corrosive materials. The environmental hazard pictogram indicates aquatic toxicity. These symbols appear on virtually every hazardous chemical container in the shop, and knowing what they mean is a fundamental skill.
Theater-Specific Chemical Hazards
While the HCS applies universally, theater environments involve specific chemical categories that deserve particular attention.
Paints, Dyes, and Coatings
Scenic painting involves a wide range of products, from water-based latex paints to specialty coatings with significant solvent content. Water-based paints are generally lower-hazard for inhalation, but acrylic binders in spray applications can be respiratory irritants. Solvent-based paints, primers, and clear coats may contain aromatic hydrocarbons (benzene, toluene, xylene) or ketones with significant inhalation hazards. Fabric dyes used in the costume shop may contain substances with skin sensitization or carcinogenic potential. All of these products require SDS review before use, appropriate ventilation (or respiratory protection if ventilation is inadequate), and skin protection as indicated.
Adhesives and Solvents
Theater construction and prop making rely heavily on adhesives: contact cements, epoxies, cyanoacrylates (super glues), hot melt adhesives, and construction adhesives. Many of these contain solvents that evaporate during use and may be flammable, toxic, or both. Contact cement: a staple of prop and costume construction: typically contains n-hexane or acetone-based solvents with significant flammability and neurotoxicity hazards. The SDS for the specific product in use must be reviewed, adequate ventilation must be provided, and ignition sources must be controlled when using flammable adhesives.
Flame Retardant Treatments
Stage draperies and soft goods must meet flame retardancy requirements under NFPA 701 (National Fire Protection Association, 2019) and applicable building and fire codes. Flame retardant treatments may be applied in the field using spray or dip applications of chemical solutions. These solutions may contain borates, phosphates, or halogenated compounds. The SDS for the treatment product in use must be reviewed, and workers applying treatments must use appropriate PPE: typically gloves, eye protection, and respiratory protection if spray application is used.
Fog Fluids and Pyrotechnic Materials
Theatrical fog, haze, and atmospheric effect materials are addressed by ANSI E1.5-2009 (R2024) and ANSI E1.23-2020 (Entertainment Services and Technology Association). These materials, while generally lower-hazard than many industrial chemicals, are not without risk: repeated or excessive exposure to glycol-based fog fluids has been associated with respiratory irritation, particularly in performers and crew with preexisting conditions. Pyrotechnic materials used in theatrical applications carry significant hazards including flammability, toxicity from combustion products, and detonation risk and must be handled only by trained, licensed individuals.
Purchasing, Storage, and Disposal
The responsibilities of a theater technician with respect to chemical safety begin before the chemicals arrive. Specifying the safest effective product for a given application: the principle of chemical substitution: is the first step in hazard reduction. A water-based contact adhesive that performs adequately is always preferable to a solvent-based version for the same application, even if the solvent version has advantages in speed or strength.
Storage of hazardous chemicals must comply with the requirements in the SDS Section 7, applicable NFPA standards (particularly NFPA 30, the Flammable and Combustible Liquids Code, for solvent storage), and local fire code. Flammable solvents must be stored in UL-listed flammable storage cabinets, not in standard wooden cabinets or under work tables. Incompatible chemicals: oxidizers and flammable materials, acids and bases: must be segregated. All containers must be properly labeled at all times, including secondary containers into which chemicals have been decanted.
Chemical waste disposal is a legal obligation, not just a best practice. Used solvents, contaminated rags, paint waste, and other chemical-bearing materials are often classified as hazardous waste under federal and state environmental law. Disposing of these materials down the drain or in the regular trash may violate the Resource Conservation and Recovery Act (RCRA) and state environmental regulations. Theaters must work with their institutional waste management program or a licensed hazardous waste contractor to ensure compliant disposal.
What to Do in a Chemical Spill
Every theater technician must be trained in spill response before working with hazardous chemicals. The response to a chemical spill depends on the nature and quantity of the chemical, but the general sequence is: evacuate non-essential personnel from the immediate area; consult the SDS Section 6 for specific spill response instructions; don appropriate PPE before approaching the spill; contain the spill using absorbent materials appropriate for the chemical; collect spill material and dispose of it as hazardous waste; ventilate the area; and report the spill to a supervisor and document it in the incident log.
For large spills of highly toxic or flammable materials, the appropriate response may be to evacuate the building and call the fire department rather than attempting in-house cleanup. The SDS will indicate when a spill is beyond the capacity of general employees to manage safely. Training on spill response must include this judgment: knowing when to call for outside help is as important as knowing how to handle small spills.
Key Takeaways
- OSHA’s Hazard Communication Standard (29 CFR 1910.1200) is federal law: every theater that uses chemical substances must comply fully.
- SDSs must be maintained for every hazardous chemical in the workplace and must be accessible to workers during their shifts.
- GHS pictograms on container labels communicate hazard categories at a glance: all technicians must be trained to recognize and interpret them.
- Chemical substitution: choosing the safest effective product: is the first line of defense against chemical hazards.
- Flammable materials must be stored in UL-listed storage cabinets, not standard wooden cabinets.
- Chemical waste disposal must comply with RCRA and state environmental law; improper disposal creates legal and environmental liability.
- Spill response training must precede any work with hazardous chemicals.
References
Entertainment Services and Technology Association. (2020). ANSI E1.23-2020: Entertainment technology: Design, execution, and maintenance of atmospheric effects. ESTA.
Entertainment Services and Technology Association. (2024). ANSI E1.5-2009 (R2024): Entertainment technology: Theatrical fog made with aqueous solutions of di- and trihydric alcohols. ESTA.
National Fire Protection Association. (2019). NFPA 701: Standard methods of fire tests for flame propagation of textiles and films. NFPA.
National Fire Protection Association. (2021). NFPA 30: Flammable and combustible liquids code. NFPA.
Occupational Safety and Health Administration. (2023). 29 CFR 1910.1200: Hazard communication. U.S. Department of Labor. https://www.osha.gov/hazcom
U.S. Environmental Protection Agency. (2023). Resource Conservation and Recovery Act (RCRA): Hazardous waste. EPA. https://www.epa.gov/rcra