Some, but not all, of these classes are associated with a chemical hazard symbol and/or a code.

The use of hazard symbols is often regulated by law and directed by standards organizations.

The sign contained the international biological hazard symbol, along with the admonition that Britain was "contaminated, keep out!"

Very often, hazard symbols (special pictograms) are used.

Other symbols, like the biohazard or radioactive hazard symbols, can also be used, but these aren't official.

These are the hazard symbols for chemicals:

Hazard symbols may appear with different colors, backgrounds, borders and supplemental information in order to specify the type of hazard.

Hazard symbols are special symbols.

Hazard symbol are recognizable symbols designed to warn about hazardous materials, locations, or objects, including electric currents, poisons, and other things.

Both cylinders were emblazoned with the universal-radiation hazard symbol, and both had PU-239 painted on them in block letters.

Labels can include hazard symbols such as the European Union standard black diagonal cross on an orange background, used to denote a harmful substance.

Over a thousand people brought wooden crosses in the shape of the radiation hazard symbol and planted them along the grass verge entrance to the power station.

These hazard symbols are not part of the NFPA 704 standard, but are occasionally used in an unofficial manner.

It is often used on hazard symbols, warning signs, guard rails, dangerous equipment and some high-visibility clothing and personal protective equipment.

It introduces new classification criteria, hazard symbols (pictograms) and labelling phrases, while taking account of elements which are part of the current EU legislation.

Pictograms include the harmonized hazard symbols plus other graphic elements, such as borders, background patterns or cozers and substances which have target organ toxicity.

It is also very toxic to aquatic organisms and may cause long-term adverse effects in aquatic environments (EC hazard symbol N).

Thiomersal is very toxic by inhalation, ingestion, and in contact with skin (EC hazard symbol T+), with a danger of cumulative effects.

These hazard symbols for chemicals are defined in Annex II of Directive 67/548/EEC.

In the old European Union standard, a black saltire set in an orange square is the hazard symbol for irritants (Xi) or harmful chemicals (Xn).

As well as the requirements specific to their transportation, suppliers of dangerous goods are required by law to label their hazardous products and packaged chemicals with hazard symbols, warnings and safety advice.

The original album cover was supposed to be grey with a black biological hazard symbol, but after considering legal actions and negative reception they decided to change it; the biohazard logo was replaced by a bloody hand.

As a result of research, a new radiation hazard symbol was developed to be placed near the most dangerous parts of radiation sources featuring a skull, someone running away, and using the color red rather than yellow as the background.

In November 2011, the Camden Robbo mural was painted over with a black and white depiction of the original with the additions of a crown and a can of spray paint with a hazard symbol of a flame above it.

OXY - Oxidizer ACID ALK - Alkali COR - Corrosive You may also see a "W" with a bar through it (meaning "use no water"), or the radiation hazard symbol for radioactive materials.