1. Hazards by class

2. Bases Precautions: Wear gloves Protect metals (cover with plastic) Wipe off seal after each use before closing White Label DDC 01xx Examples: 1 2 3 4 Corrosive

3. Acids Precautions: Separate organic and inorganic Wear gloves Protect metals (cover with plastic) Wipe off seal after each use before closing White Label DDC 02xx Examples: (with cap color) Acetic Acid—Brown Phosphoric Acid—White Hydrochloric Acid—Blue Sulfuric Acid—Yellow Nitric Acid—Red Corrosive

4. Oxidizers Precautions: Keep away from combustible materials DDC 16xx Examples: Sodium hypochlorite Potassium permanganate Peroxides Perchlorates Nitrates Oxidizing Yellow Label

5. Flammables Precautions: Keep away from oxidizers and ignition sources Red Label DDC 08xx Examples: Many solvents – Acetone, ether, methanol, benzene Phosphorus Magnesium Flammable

6. Reactive Precautions: Keep well sealed Protect against moisture and vibration Isolate from atmosphere by storing under inert gas (Nitrogen) or liquid (oil) DDC 04xx, 12xx Examples: Water reactive: – Na/K/Li metal – Metal hydrides Shock reactive: – Organic peroxides – Heavy metal azides Reacts with Air Water Shock Yellow Label

7. Inhalation Hazard Precautions: Keep well sealed Blue Label DDC ##PH Examples: Methyl iodide Methylamine Thionyl chloride Silica Ammonia Toxic if inhaled

8. Toxic Precautions: Do not swallow, touch, or inhale Wash hands after handling Blue Label DDC 18xx Examples: Cyanides Azides Sulfides DMSO Chloroform Toxic if swallowed

9. Low Hazard Precautions: Keep liquids below eye level Grey Label DDC 05xx, 06xx Examples: Halogen salts Buffers Chemicals with low reactivity (lots of examples) Orange Label Green Label Irritant

10. Radioactive Precautions: Authorized users only! Leave shielding in place What about the testing / monitoring badges/ rings? DDC ##RA Examples: 3 H 14 C 32 P 125 I 35 S

11. Biohazard Precautions: Materials must be inactivated before disposal Examples: E. coli S. cerevisiae Salmonella Viruses May also be: Toxic Harmful to environment

12. Mercury or Heavy Metal Precautions: Materials must be disposed as hazardous waste Examples: Mercury Cadmuim Lead Toxic Harmful to environment

13. Carcinogen Precautions: Do not swallow, touch or inhale Use appropriate gloves Examples: Arsenic Beryllium Benzene Formaldehyde Vinyl Chloride Cancer causing Toxic

14. Reproductive Toxin Precautions: Do not swallow, touch or inhale Use appropriate gloves Examples: Selenium/ Tellurium Methylene chloride Chloroform Arsenic Xylene Toxic

15. Nanoparticle Precautions: Do not swallow, touch or inhale Use appropriate gloves Keep well sealed Examples: Au (gold) Ag (silver) Mesoporous silica Iron oxide

16. Time Sensitive Materials DDC ##PF Peroxide formers Precautions: Avoid metal caps, heat, light Visually check for crystals Test every 1, 3, 6 or 12 months Dispose if > 80 ppm peroxides or > 2 yrs Examples: Diethyl Ether Tetrahydrofuran (THF) Dioxane

17. Sensitive Materials Temperature sensitive store at proper temperature Precautions: Store in secondary containers to segregate hazards Light sensitive store in the dark

18. Sensitive to Humidity Some chemicals need to be kept Dry – Store in dessicant to remove humidity. – Protect from moisture. Moist – Store in overpack with wet towel. – Do NOT allow to dehydrate

19. Pressure Difference Precautions: Do not heat, cool, or attempt to open while under pressure Protect from impact Vacuum Risk of Projectiles Secure upright Transport in a secure cart Compressed Gas Pressurized materials Use plastic netting to control glass shards if implosion Apply grease to seal DDC ##CG