UN Hazard codes

  • Class 1 Explosive
  • Class 2 Gases
  • Class 3.1 Flammable liquids, flash point below -18C
  • Class 3.2 Flammable liquids, flash point between -18C and 23C
  • Class 3.3 Flammable liquids, flash point between 23C and 61C
  • Class 4.1 Flammable solids
  • Class 4.2 Substances liable to spontaneous combustion
  • Class 4.3 Substances which, in contact with water, release flammable gases
  • Class 5.1 Oxidizing agents
  • Class 5.2 Organic peroxides
  • Class 6.1 Poisonous substances ... such as 2-butoxyethanol  Poison! Poison!
  • Class 6.2 Infectious substances
  • Class 7 Radioactive substances
  • Class 8 Corrosive substances
  • Class 9 Miscellaneous dangerous substances
  • NR Non-regulated

http://ptcl.chem.ox.ac.uk/MSDS/glossary/un_hazard_codes.html

Posted here by Oxford University

 

More Definitions on Hazardous Substances

http://www.gordon.army.mil/dpw/enrmo/sop/satellite_turnin.html 

1. INTRODUCTION

The Resource Conservation and Recovery Act (RCRA) was enacted by Congress in 1976 to ensure that all wastes are properly handled, treated, stored and disposed.

RCRA is a "cradle to grave' framework to control waste that may pose special threats to human health or the environment. It is a means of tracking hazardous waste from it's generation (cradle) to final disposition (grave).

Subtitle C of RCRA addresses hazardous waste management and established:

a. The definition of hazardous waste.

b. Standards for those who generate, store, treat, transport or dispose of hazardous waste.

c. Standards for emergency response, record keeping, and training.

d. Civil and criminal penalties for non-compliance.

This management guide has been prepared to provide information for the proper management of hazardous waste Satellite Accumulation Points (SAPs) in accordance with State and Federal regulations. It also provides information for the turn-in of hazardous material and hazardous waste to the Hazardous Materials Control Center (HMCC).

2. DEFINITIONS OF HAZARDOUS MATERIAL AND WASTE

a. Hazardous Material: A substance or material which has been determined by the Secretary of Transportation to be capable of posing an unreasonable risk to health, safety, and property when transported in commerce, and which has been so designated (i.e., listed in 49 CFR 172.101). Also, items that have been identified as hazardous by the Occupational Safety and Health Administration (OSHA), the Toxic Substances Control Act (TCSA), or any other Federal/State/Local legislation or regulation, provided they are as stringent or more stringent than Federal regulations.

The term "hazardous material" can refer to a variety of substances (including paints, POL products, pesticides, explosives, and asbestos).

b. Hazardous Waste: A waste is hazardous if it exhibits physical or chemical characteristics causing it to be hazardous (as defined below) or if it is specifically listed as a hazardous waste (40 CFR, Part 261). Consequently, a hazardous material becomes a regulated hazardous waste only if it satisfies one of the following criteria upon being discarded.

(1) Characteristics of hazardous waste are:

a. Ignitable: Has a Flashpoint less than 140 degree F.

b. Corrosive: Has a PH less than or equal to 2 or greater than or equal to 12.5.

C. Reactive: Normally unstable, explosive or reacts violently with water.

d. Toxic: Contains chemicals that are harmful to human health and will leach out of a substance under the conditions found in a landfill (see 40 CFR 261.24) (D-listed wastes).

(2) Hazardous wastes from non-specific sources (40 CFR 261.31) (F-listed wastes).

(3) Hazardous wastes from specific sources (40 CFR 261.32) (K-listed wastes).

(4) Discarded chemical products, container residues and spill residues of the chemical products (40 CFR 261.33) (P-listed wastes - acutely toxic) (U-listed wastes).

3. TRAINING

Employees who are occupationally exposed to, or who handle hazardous waste must receive initial and annual hazardous waste training. They must successfully complete the training within six months after they begin to work with hazardous waste. At a minimum, the training must be designed to ensure that personnel are able to respond effectively to emergencies. New employees will require constant supervision (by trained personnel) until they have completed training.

 

4. MATERIAL SAFETY DATA SHEETS

Material Safety Data Sheets (MSDS) must be available at all work locations where a hazardous chemical will be used. The material safety data sheets should be in a specified area, well marked and all employees should be encouraged to read and understand them.