Class 1 dangerous goods are explosive substances and articles. The number tells the responders the type of hazard NOT its degree.
The GHS was developed to identify to the user of a material both the.
What is the most dangerous hazard class. There are 6 sub-divisions. Substances and articles which have a mass explosion hazard. The number tells the responders the type of hazard NOT its degree.
A Class 8 might be less dangerous than a Class 2. Something can be a Class 1 and not as dangerous as some Class 9. Something can be a Class 1 and not as danger.
Category 2 within the same hazard class is more hazardous than category 3 and so on. Includes solids or liquids having anesthetic noxious or other properties Examples. Substances and articles which have a fire hazard and either a minor blast hazard or a minor projection hazard or both.
Dry ice some cosmetics drugs and magnetized materials. Click chart for larger view. For visible-beam consumer lasers there are four main classes.
– Miscellaneous dangerous items or substances not covered in the other hazard classes. The chart below shows how the eye injury hazard increases as the lasers power increases. This GHS numbering system is the opposite of the NFPA rating system under the NFPA system the most dangerous rating is 4 while 0 would pose a minimal hazard.
So category 1 hazards are the most dangerous. As a Hazmat First Responder I think I need to clarify what the Classes mean. Category 1 is always the greatest level of hazard that is it is the most hazardous within that class.
The LOWER the number the GREATER the severity of the hazard. Each is described in more detail here. There are a few exceptions to this rule.
The first two Classes are relatively safe for eye exposure. Class 2 Class 3R Class 3B and Class 4. For example Class 3 includes flammable liquids and Class 8 includes corrosive materials.
Dangerous Goods Hazard Classes The Department of Transportation categorizes dangerous goods into nine hazard classes that describe different types of risks. The appropriate dangerous goods packaging is based on the most appropriate hazard classification of a product and its physical attributes. If Category 1 is further divided Category 1A within the same hazard class is a greater hazard than category 1B.
Also Know what is a Class 1 hazard. Learn more about commonly shipped dangerous goods PDF for each hazard class. There are as you should already know 9 Hazard Classes.
The last two are hazardous. For example you cannot ship corrosive materials in metal packages because corrosives violently react with metal and will eventually destroy the package. When a First responder comes on the scene of an incident they will be looking for a placard with the Class symbol and NA or UN number.