h312

H312 is a hazard statement code used in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) to indicate that a substance or mixture is "Harmful in contact with skin." It communicates a specific acute toxic effect route and severity level for regulatory labeling, safety data sheets, and workplace communication to inform handlers and emergency responders about dermal toxicity risk.

The statement is applied when testing or reliable data indicate that skin contact with a substance can produce systemic adverse effects at exposure levels that do not meet more severe classifications such as "toxic" or "fatal" by dermal exposure. Products bearing H312 commonly also carry precautionary phrases advising avoidance of skin contact, use of protective gloves and clothing, and immediate washing after exposure. Where relevant, an exclamation mark pictogram may be used to denote this class of hazard under GHS implementation in many jurisdictions.

H312 often appears alongside other hazard statements describing additional routes of exposure or effects and is incorporated into labeling and safety data sheets to guide safe handling, storage, transport, and emergency measures. First aid recommendations typically include removing contaminated clothing, rinsing skin with water, seeking medical attention if symptoms develop, and providing medical personnel with the product information. Regulatory specifics, including exact classification criteria and required precautionary statements, vary by region and implementing legislation.