Flammable Liquid Storage Requirements for Class 1A, 1B, 1C

Posted by Safe & Vault on Jun 19, 2015

Flammable liquids are defined by OSHA as any with a flashpoint below 100 F. They are defined in three classes. Many of these liquids have storage requirements in flammable liquid storage cabinets. Depending on the safety requirements and compliance of your local OSHA jurisdiction, certain class flammable liquids may need Securall flammable safety cabinetsthat are designed for cans, drums, chemical storage and more.

CLASS 1A – Flash point below 73 F, boiling point below 100 F and could require OSHA approved safety cabinets that meet flammable liquid storage compliance requirements.


  • chemical synthesis
  • production of perfumes
  • polyester resins
  • dyes
  • fruit and fish preservative
  • flavoring agent
  • denaturant for alcohol
  • solvent in rubber, tanning, and paper industries


  • wart remover
  • liquid bandage products
  • glueing electrodes to the head for electro-encephalography
  • theatrical makeup
  • cleaning of optics such as telescope mirrors

ethyl ether

  • solvent in production of cellulose plastics
  • starting fluid for gasoline
  • laboratory solvent

ethyl chloride

  • treating cellulose to make ethyl cellulose
  • mild topical anesthetic

methyl ethyl ether (methoxyethane)

  • anesthetic


  • solvent in laboratory use

petroleum ether (benzine)

  • main ingredient in label removers
  • laboratory solvent

propylene oxide

  • production of polyurethane plastics
  • hydrolyzed into propylene glycol
  • pasteurizing raw almonds
  • glow fuel for model aircraft and surface vehicles
  • preparation of biological samples for electron microscopy

CLASS 1B Liquids = Flash point below 73 F, boiling point at or above 100 F and may require OSHA approved safety cabinets for proper storage.


  • solvent
  • thinning polyester resin
  • removing rosin flux after soldering
  • paints and varnishes


  • chemical synthesis
  • rubbers
  • lubricants
  • dyes
  • detergents
  • pharmaceuticals
  • explosives
  • pesticides

butyl alcohol (butanol)

  • biofuel
  • solvent
  • base for perfumes

ethyl acetate

  • solvent
  • diluent
  • circuit board cleaner
  • nail varnish remover
  • decaffeination of coffee beans and tea leaves
  • insect asphyxiant for use in bug collecting

ethyl alcohol (ethanol)

  • alcoholic beverages
  • antiseptic
  • antitussive
  • antidote to methanol poisoning
  • engine fuel and fuel additive
  • rocket fuel
  • commercial fuel cells
  • household heating
  • solvent


  • fuel


  • organic solvent
  • component in jet fuel surrogate blends


  • solvent
  • octane booster
  • breaking open red blood cells in order to extract hemoglobin in biochemical experiments

CLASS 1C Flammable Liquids for Storage = Flashpoint at or above 73 F, boiling point below 100 F.

amyl acetate

  • flavoring agent
  • paint lacquer and solvent
  • preparation of penicillin

amyl alcohol

  • solvents

dibutyl ether

  • solvents


  • solvent for coatings and industrial processes
  • household use
  • personal care products
  • keyboard, LCD, and laptop cleaning
  • whiteboard cleaner
  • disinfecting pads
  • preventative for swimmer’s ear
  • removing brake fluid traces from hydraulic braking systems
  • DNA extraction

methyl alcohol (methanol)

  • chemical synthesis
  • biodiesel component
  • fuel
  • solvent
  • wastewater treatment
  • camping / boating stove fuel


  • plastic and foam production


  • solvent
  • additive to cleaning and sanitary products


  • solvent
  • component of ink, rubber, and adhesives
  • paint thinners and varnishes
  • cleaning agent
  • dissolves gutta percha, a material used in endodontics
  • combined with dry ice to make a bath that cools reaction vessels in laboratories