Hazcom Labeling & Marking
System
OSU HMLS* LABELING SYSTEM
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 NOTE: * |
next to the Health number means that the substance has chronic health effects. |
| HEALTH | |
| 4 | Deadly: even the slightest exposure to this substance would be life threatening. Only specialized protective clothing, for these materials, should be worn. |
| 3 | Extreme Danger: serious injury would result from exposure to this substance. Do not expose any body surface to these materials. Full protective measures should be taken. |
| 2 | Dangerous: exposure to this substance would be hazardous to health. Protective measures are indicated. |
| 1 | Slight Hazard: irritation or minor injury would result from exposure to this substance. Protective measures are indicated. |
| 0 | No Hazard: exposure to this substance offers no significant risk to health. |
| FLAMMABILITY | |
| 4 | Flash Point Below 73ºF and Boiling Point Below 100ºF: this substance is very flammable, volatile or explosive depending on its state. Extreme caution should be used in handling or storing of these materials. |
| 3 | Flash Point Below 100ºF: flammable, volatile or explosive under almost all normal temperature conditions. Exercise great caution in storage or handling of these materials. |
| 2 | Flash Point Below 200ºF: moderately heated conditions may ignite this substance. Caution procedures should be employed in handling. |
| 1 | Flash Point Above 200ºF: this substance must be preheated to ignite. Most combustible solids would be in this category. |
| 0 | Will Not Burn: substances that will not burn. |
| REACTIVITY | |
| 4 | May Detonate: substances that are readily capable of detonation or explosion at normal temperatures and pressures. Evacuate area if exposed to heat or fire. |
| 3 | Explosive: substances that are readily capable of detonation or explosion by a strong initiating source, such as heat, shock or water. Monitor from behind explosion-resistant barriers. |
| 2 | Unstable: violent chemical changes are possible at normal or elevated temperatures and pressures. Potentially violent or explosive reaction may occur when mixed with water. Monitor from a safe distance. |
| 1 | Normally stable: substances that may become unstable at elevated temperatures and pressures or when mixed with water. Approach with caution. |
| 0 | Stable: substances which will remain stable when exposed to heat, pressure or water. |
PROBLEM SESSION #1
Develop the HMLS labeling code for each of the following hazardous materials.
(Several MSDS can be inserted here)
SIGNS AND PLACARDS
All buildings on Oklahoma State University property will be placarded in compliance with the law. Each building which contains over the TPQ (threshold planning quantity) of a hazardous substance will bear the appropriately numbered, diamond-shaped placard approved by the National Fire Protection Association (NFPA).
(See example of placard at right)
WORKSHOP ANSWERS
MEK 1*30 (Depends)
TOLUENE 2*30 (Depends)
WOW Not Regulated (Depends)
Aluminum 2*01 (Depends)
Material Safety Data
Sheets
Training
Sessions