OSHA & HazCom Glossary

202 plain-English definitions across OSHA, GHS, SDS, construction safety, and HazCom compliance — with regulatory references.

OSHA

• Abatement
• Area Director
• Bureau of Labor Statistics (BLS)
• Competent Person
• Citation
• Closing Conference
• Compliance Officer (CSHO)
• Contest
• DART Rate
• De Minimis Violation
• Egregious Violations
• Employer
• Experience Modification Rate (EMR)
• Failure-to-Abate
• General Duty Clause
• Good Faith Reduction
• Hazard Communication Standard (HCS)
• HazCom Program
• Imminent Danger
• Informal Conference
• Multi-Employer Worksite
• National Emphasis Program (NEP)
• Opening Conference
• OSHA 300 Log
• OSHA 300A
• OSHA 301
• OSHRC
• Other-Than-Serious Violation
• Penalty
• Permissible Exposure Limit (PEL)
• Programmed Inspection
• Qualified Person
• Recognized Hazard
• Recordable Injury
• Repeat Violation
• Serious Violation
• Variance
• Voluntary Protection Programs (VPP)
• Whistleblower Protection
• Willful Violation
• Authorized Employee
• Affected Employee
• Bloodborne Pathogens
• Combustible Dust
• Emergency Action Plan (EAP)
• Fire Prevention Plan
• Hazardous Energy
• Hearing Conservation Program
• Heat Illness Prevention
• Medical Surveillance
• Noise Exposure
• Process Safety Management (PSM)
• Respiratory Protection Program
• Site-Specific Targeting (SST)
• Zero Energy State

GHS

• Acute Toxicity
• Aspiration Hazard
• Carcinogenicity
• Chemicals Under Pressure
• Classification
• Corrosive to Metals
• Desensitized Explosives
• Globally Harmonized System (GHS)
• GHS Revision 7
• GHS01 (Exploding Bomb)
• GHS02 (Flame)
• GHS03 (Flame Over Circle)
• GHS04 (Gas Cylinder)
• GHS05 (Corrosion)
• GHS06 (Skull and Crossbones)
• GHS07 (Exclamation Mark)
• GHS08 (Health Hazard)
• GHS09 (Environment)
• Hazard Category
• Hazard Class
• Hazard Statement (H-code)
• LC50
• LD50
• Mutagenicity
• Oxidizer
• Pictogram
• Precautionary Statement (P-code)
• Product Identifier
• Reproductive Toxicity
• Self-Classification
• Signal Word
• Skin Corrosion
• Skin Sensitization
• STOT (Specific Target Organ Toxicity)
• Supplemental Label Element
• Aerosol
• Flammable Gas
• Organic Peroxide
• Pyrophoric
• Self-Heating Substance
• Water-Reactive Substance

SDS

• Safety Data Sheet (SDS)
• MSDS (Material Safety Data Sheet)
• Readily Accessible
• Section 1: Identification
• Section 2: Hazard Identification
• Section 3: Composition
• Section 4: First Aid Measures
• Section 5: Firefighting Measures
• Section 6: Accidental Release
• Section 7: Handling & Storage
• Section 8: Exposure Controls / PPE
• Section 9: Physical & Chemical Properties
• Section 10: Stability & Reactivity
• Section 11: Toxicological Information
• Section 12: Ecological Information
• Section 13: Disposal Considerations
• Section 14: Transport Information
• Section 15: Regulatory Information
• Section 16: Other Information

General Safety

• Action Level
• Administrative Controls
• Biological Exposure Index (BEI)
• California Proposition 65
• CAS Number
• Ceiling Limit
• Chemical Compatibility
• Chemical Inventory
• Combustible Liquid
• Decontamination
• Dose-Response Relationship
• Engineering Controls
• EPCRA
• Exposure Assessment
• First Aid
• Flash Point
• Flammable Liquid
• Hierarchy of Controls
• IDLH
• Industrial Hygiene
• LEL / LFL
• NFPA 704 Diamond
• NIOSH
• Occupational Illness
• pH
• PPE (Personal Protective Equipment)
• Respiratory Sensitization
• Right to Know
• SARA (Superfund Amendments and Reauthorization Act)
• STEL (Short-Term Exposure Limit)
• Threshold Limit Value (TLV)
• Tier II Report
• Time-Weighted Average (TWA)
• UEL / UFL
• UN Number
• Vapor Pressure
• CERCLA
• Biological Monitoring
• Confined Space Entry Permit
• Ergonomics
• Hazardous Waste
• Material Safety Data Sheet (MSDS)
• Occupational Exposure Limit (OEL)
• Recommended Exposure Limit (REL)
• Risk Assessment
• Safety Culture

Construction

• 29 CFR 1910
• 29 CFR 1926
• Anchor Point
• Atmospheric Testing
• Benching
• Competent Person (Excavation)
• Confined Space
• Controlling Employer
• Crane Operator Certification
• Electrical Safety (Construction)
• Excavation
• Exposing Employer
• Fall Protection
• GFCI (Ground-Fault Circuit Interrupter)
• Guardrail System
• Hot Work Permit
• Job Hazard Analysis (JHA)
• Leading Edge
• LOTO (Lockout/Tagout)
• Near Miss
• PFAS (Personal Fall Arrest System)
• Respirable Crystalline Silica
• Root Cause Analysis (RCA)
• Safety Net
• Scaffold
• Secondary Container
• Shoring
• Silicosis
• Sloping
• Soil Classification
• Table 1
• Toolbox Talk
• Trench Box
• Aerial Lift
• Competent Person (Scaffold)
• Caught-In/Between Hazard
• Electrocution
• Focus Four Hazards
• Struck-By Hazard
• Trenching
• Wet Stacking

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