GHS and the NEW practices are here to stay stop whining and they have certain BOLD and frontline features that cross over into Dangerous Goods/Hazmat so do you the worker know what they are?

1. Where worker
knowledge in GHS and
TDG crosses over into
worker Safety
Understanding
The Globally Harmonized System of Classification and Labelling of Chemicals
(GHS) and the UN Recommendations on the Transport of Dangerous Goods
Model Regulations (TDG) are the most important guidance documents on
chemical hazard communication in the world. Most of countries have
adopted GHS and TDG via their own national regulations. The correlations
between GHS and TDG, and compare GHS with TDG in terms of classification
criteria and labelling requirement. Learning Dangerous Goods is easy all you
have to remember is all 9 Classes and 27 Hazard Classes to Competent in
TDG/Hazmat, now add all the GHS knowledge!
Comparison of GHS Classification and Transport
Classification
GHS Classification Dangerous Goods Classification
Unstable explosives Not allowed for transport
Explosives, Division 1.1, 1.2, 1.3,
1.4, 1.5, 1.6
Class 1 explosive substances and
articles, Division 1.1, 1.2, 1.3, 1.4, 1.5,
1.6

2. GHS Classification Dangerous Goods Classification
Flammable gases category
1//Pyrophoric gases category 1/
Class 2 Division 2.1: Flammable gases
Flammable gases category
2/Chemically unstable gases
category A/B
Not dangerous goods
Aerosols category 1 and 2 Class 2 Division 2.1: Flammable gases
Aerosols category 3 Class 2 Division 2.2: Non-flammable,
non-toxic gases
Oxidizing gases category 1 Class 5 Division 5.1: Oxidizing
substances
Gases under pressure Class 2 Division 2.2: Non-flammable,
non-toxic gases
Flammable liquids, category 1, 2, 3 Class 3 Flammable liquids, packing
group I, II, III
Flammable liquids, category 4 Not dangerous goods
Flammable solids category 1, 2 Class 4 Division 4.1: Flammable solids,
packing group II, III
Self-reactive substances, Type A See explosives. May not be allowed for
transport.

3. GHS Classification Dangerous Goods Classification
Self-reactive substances, Type
B,C,D,E,F
Class 4 Division 4.1: Flammable solids
Self-reactive substances, Type G Not dangerous goods
Pyrophoric solids category 1 Class 4 Division 4.2: Substances liable
to spontaneous combustion
Pyrophoric liquids category 1 Class 4 Division 4.2: Substances liable
to spontaneous combustion
Self-heating substances and
mixtures, category 1, 2
Class 4 Division 4.2: Substances liable
to spontaneous combustion, Packing
group II, III
Substances which on contact with
water emit flammable gases
category 1, 2, 3
Class 4 Division 4.3: Substances which,
in contact with water, emit flammable
gases, Packing group I, II, III
Oxidizing liquids category 1, 2, 3 Class 5 Division 5.1: Oxidizing
substances, Packing group I, II, III
Oxidizing solids category 1, 2, 3 Class 5 Division 5.1: Oxidizing
substances, Packing group I, II, III
Organic peroxides type A See explosives. May not be allowed for
transport.
Organic peroxides type B, C, D, E, F Class 5 Division 5.2: Organic peroxides

4. GHS Classification Dangerous Goods Classification
Organic peroxides type G Not dangerous goods
Corrosive to metals category 1 Class 8 corrosive substances, Packing
group III
Acute toxicity category 1, 2, 3 Class 6 Division 6.1: Toxic substances,
Packing group I, II, III
Acute toxicity category 4,5 Not dangerous goods
Skin irritation/corrosion category 1
(1A/1B/1C)
Class 8 corrosive substances, Packing
group I, II, III
Skin irritation/corrosion category 2
& 3
Not dangerous goods
Serious eye damage/eye irritation
category 1/2A/2B
Not dangerous goods
Respiratory or skin sensitization
category 1
Not dangerous goods
Germ cell mutagenicity category
1A/1B/2
Not dangerous goods
Carcinogenicity category 1A/1B/2 Not dangerous goods
Reproductive toxicity category Not dangerous goods

5. GHS Classification Dangerous Goods Classification
1A/1B/2
Serious eye damage/eye irritation
category 1/2A/2B
Not dangerous goods
Target organ systemic toxicity -
single exposure category 1, 2 and 3
Not dangerous goods
Target organ systemic toxicity -
repeated exposure category 1 and
2
Not dangerous goods
Aspiration toxicity category 1 and 2 Not dangerous goods
Hazardous to aquatic environment
(acute) category 1
Class 9 miscellaneous dangerous
goods: marine pollutant or
environmentally hazardous substances,
packing group III
Hazardous to aquatic
environment (acute) category 2
and 3
Not dangerous goods
Hazardous to aquatic
environment (chronic) category 1
and 2
Class 9 miscellaneous dangerous
goods: marine pollutant or
environmentally hazardous substances,
packing group III
Hazardous to aquatic environment
(chronic) category 3 and 4
Not dangerous goods

6. GHS Classification Dangerous Goods Classification
Hazardous to the Ozone layer Not dangerous goods
DangerousGoodsare substancesthatare corrosive,flammable,explosive,spontaneouslycombustible,
toxic,andoxidisingorwaterreactive.These goodscanbe deadlyandcanseriously damage property
and the environment.Therefore,it’simportantthattheyare storedandhandledsafely.
Petrol,LPG,paints,pesticidesandacidsare examplesof commonlyuseddangerousgoods.
Classes of Dangerous Goods
Each substance or article of DangerousGoodsnamedinthe Code isassignedtoa particularClass
relatingtoitsprimaryhazardousproperty.The Classesare as follows:
Class 1: Explosives
Explosivesrange fromthose whichare extremelyhazardouswithamassexplosionhazardsuchasTNT,
GunpowderandGelignite etc.
Class 2 Gases: Compressed, Liquefied or Dissolved Under Pressure
Class2 issubdividedintothe followingthree Divisions:
2.1 Flammable gasesi.e.acetylene andmostAerosols.
2.2 Non-flammable,non-toxicgasesi.e.heliumandoxygen.
2.3 Poisonousgasesi.e.chlorine.
Class 3: Flammable Liquids

7. Liquidswhichcanburn andhave a FlashPoint(notboilingpoint) below 60.5°Ci.e.acetone and
kerosene.
Class 4: Flammable Solids etc.
Class4 issub-dividedintothe following threeDivisions:
4.1 Flammable solidsi.e.phosphorous(red).
4.2 Substancesliable to(white) spontaneouscombustioni.e.phosphorus.
4.3 Substanceswhich,whentheycome incontact,emitflammablegasesi.e.sodiumwithwater.
Class 5: Oxidising Agents and Organic Peroxides
Class5 issub-dividedintothe followingtwoDivisions:
5.1 Oxidizingagentsi.e.ammoniumdichromate.
5.2 Organicperoxidesi.e.ethyl methyl ketone peroxide.
Class 6: Toxic and Infectious Substances
Class6 issub-dividedinto the followingtwoDivisions:
6.1 Toxicsubstancesi.e.cyanides,arseniccompoundsandleadacetate.
6.2 Infectioussubstancesi.e.vaccinesandpathologyspecimens.
Class 7: Radioactive Materials
Substancesandarticleswhichspontaneouslyemitradiation greater
than 70 kilobequeralsperkilogrami.e.uraniumoxide.
Class 8: Corrosive Substances and Articles

8. Thisclass isnot furthersub-dividedbutitincludesbothacidsandbases/alkaliswhichcanreact
dangerously
i.e.hydrochloricacid,sodiumhydroxide andbatteriescontainingacid.
Class 9: Miscellaneous Dangerous Goods
Dangeroussubstancesandarticlesthatdonot fitintothe above categories
i.e.dryice,asbestosandenvironmentallyhazardoussubstances.
Subsidiary Risk
Many dangerousgoods presentthe hazardsof more than one Classor Division.Suchgoodsare assigned
to a Classaccording to theirprimaryhazard.The otherhazard or hazards are referredtoas Subsidiary
Risks.
Examples:
Methanol is a highlyflammable liquidthatisalsotoxic.It meetsthe classificationcriteriaforbothClass
3 and Division6.1.Asitsflammabilityisitsprimaryhazard,Methanol isassignedtoClass3. It isalso
shownin your countries DangerousGoodsCode ashavinga SubsidiaryRiskof 6.1 to coverits toxicity
hazard.
Nitric Acid,Red,Fumingiscorrosive,astrong oxidisingagentandtoxic.Itmeetsthe classification
criteriaforClasses8, 5.1 and 6.1. As itscorrosivity,isitsprimaryhazard,NitricAcid,Red,Fumingis
assignedtoClass8. However,itisalsoallocatedSubsidiaryRisksof 5.1 and 6.1 to cover the other
hazards.
UnitedNations (UN) Number
Each DangerousGoods itemlistedin yourCountries DangerousGoodsCode isassignedaunique
number,knownasthe UN Number(UnitedNationsNumberorUN No.).Forexample:
 UN No.1090 Acetone
 UN No.1789 HydrochloricAcid
Some UN numbersapplytogroupsof substanceshavingsimilarhazardouspropertiesthatare not
coveredbyspecificchemical entityentries.Forexample:
 UN No.1263 Paint
 UN No. 1993 Flammable Liquid
 N.O.S.(NotOtherwiseSpecified)

9. Packing Group
DangerousGoodsof some Classesare furtherdividedintoPackingGroupsaccordingtothe degree of
dangertheypresent,asfollows:
 PackingGroup  Great Danger
 PackingGroup  MediumDanger
 PackingGroup  MinorDanger
 ‘PackingGroup’(referredtoas‘PackagingGroup’in earlierversionsof the RegulationsandCode)
doesnotapplyto those Classes/Divisionsof DangerousGoodagainstwhich‘Notapplicable’
appearsinthe table below.
The greaterthe degree of danger,the more stringentthe packagingrequirementforthe substance.
The followingClass/PackingGroupsmaybe encountered:
Class/Division Packing
Group/s
1 Not applicable
2 Not applicable
3 ,  or 

10. 4 ,  or 
5.1 ,  or 
5.2  only
6.1 ,  or 
6.2 Not applicable
7 Not applicable
8 ,  or 
9  or 
Under the GHS, hazardswill be communicatedtochemical usersthroughnine hazardpictogramswhich
representthe physical,healthandenvironmental hazards.Informationaboutthe hazardswill alsobe
communicatedusingacombinationof signal words,hazard statementsandprecautionarystatements.
GHS Symbols and meanings
Aspiratory or respiratory
hazard,carcinogenicity,
mutagenicity
Hazardous to the
environment
May causeimmediate
health effect – skin,eye,
respiratory
Acute toxicity via oral,
dermal or inhalation
Corrosive,skin damage,
eye damage
Compressed, liquefied or
dissolved gases

11. Oxidisingsubstances
Flammable,pyrophoric,
self heating substances;
water reactive
Explosives,self-reactive
substances,organic
peroxides