Stanford University

Toxic Gas Ordinance (TGO) Data Table

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Disclaimer

The information contained within this table is for use by Stanford University personnel only. This information is not provided as advice, opinion, or statement of fact and is not provided for use in any way outside of Stanford University. Any use of the information within this table, except by Stanford University personnel, is at the risk of the user only.

Warning

If you use or handle a liquid or solid material as a gas, consult with the University Occupational Health & Safety Program at EH&S (723-0448) to determine if the material is regulated under TGO.

Santa Clara County Toxic Gas Ordinance regulates materials (i.e. gases, liquids and solids) if the material falls under the definition of Class I, Class II or Class III material and meets either of the following criteria:

  1. It is shipped in compressed gas cylinders, and the material is or becomes or acts as a gas upon release at normal temperature and pressure (70F and 760 mm Hg) or;
  2. The material is used or handled as a gas whether or not the material meets the definition of a compressed gas in Article 2 of the TGO or 49 CFR Section 173.300(a).

Table-Related Column Information

SU# — Stanford University Number is an unique chemical identifier used in the Stanford Chemical Safety Database.

State — The physical state of the chemical designated by “G” for gas, “L” for liquid, and “S” for solid.

Name — A chemical name commonly used to identify the chemical. Note that most chemicals have several name synonyms; it is best to identify the chemical uniquely using the SU# and/or CAS Number.

CAS Number — Chemical Abstract Service Number is a proprietary unique identifier used to absolutely identify a chemical.

VP — Vapor Pressure (in mm of Hg) of the chemical.

MW — Molecular Weight of the chemical.

TOX Type — Toxicological information related to determining the lethal concentration (LC in PPM) or immediately dangerous to life and health (IDLH in PPM) level of a chemical. TYPE refers to the data source such as LC50 data based on a rat test group.

Exposure — Refers to the concentration (in PPM) to which the test group was exposed or the concentration at which an exposure becomes immediately dangerous to life and health. Exposure data are converted to LC50 Rat.

TGO Class — The Toxic Gas Ordinance Class (Class I, Class II, Class III, or NR) designation for the pure chemical, i.e., 100% concentration.

Class 2 — The percent concentration below which a TGO Class I becomes a TGO Class II.

Class 3– The percent concentration below which a TGO Class II becomes a TGO Class III.

NR — The percent concentration below which a TGO Class III becomes a TGO NOT REGULATED. Note that a pure Class I chemical diluted to below a concentration such that it is “not regulated” chemical still must meet the TGO provisions related to “flow limiting devices” and “fire extinguishing systems.”

Storage Group — There are 11 different groups (A B C D E F G J K L and X) that Stanford has identified for safe storage of chemicals. These are the same storage groups provided in the Stanford Chemical Safety Database.

1,1,1-TRIFLUOROACETONE

1,1-DIFLUOROETHANE

1,1-DIFLUOROETHYLENE

1,2-DICHLOROTETRAFLUOROETHANE

1,2-DIFLUOROETHYLENE

1,3-BUTADIENE

1,3-HEXAFLUOROBUTADIENE

1-BUTENE

1-CHLORO-1,1,2,2-TETRAFLUOROETHANE (HCFC-124A)

1-CHLORO-1,1-DIFLUOROETHANE (HCFC-142B)

2,2-DIMETHYLPROPANE

2-BUTENE, MIXED ISOMERS

2-CHLORO-1,1,1,2-TETRAFLUOROETHANE (HCFC-124)

2-CHLORO-1,1,1-TRIFLUOROETHANE

2-CHLORO-1,1,2-TETRAFLUOROETHANE (HCFC-124)

2-METHYLPROPANE

2-METHYLPROPENE

3-METHYL-1-BUTENE

ACETALDEHYDE

ACETYL FLUORIDE

ACETYLENE

ACETYLENE-D2

ALLENE

AMMONIA GAS

AMMONIA-15N

AMMONIA-D3

ANTIMONY HYDRIDE

ARGON, GAS

ARGON, LIQUEFIED

ARSENIC PENTAFLUORIDE

ARSINE

BETA-DIPHENYLPHOSPHINOETHYLTRIETHOXYSILANE

BIS(TRIFLUOROMETHYL)PEROXIDE

BORON TRIBROMIDE

BORON TRICHLORIDE

BORONTRIFLUORIDE, GAS

BROMINE

BROMINE CHLORIDE

BROMOCHLORODIFLUOROMETHANE

BROMOMETHANE

BROMOTRIFLUORETHYLENE

BROMOTRIFLUOROMETHANE

BUTANE

CARBON DIOXIDE, (SOLID)

CARBON DIOXIDE, GAS

CARBON MONOXIDE, GAS

CARBON MONOXIDE, LIQUEFIED

CARBON MONOXIDE-18O

CARBON TETRAFLUORIDE

CARBON-13C MONOXIDE

CARBONYL CHLOROFLUORIDE

CARBONYL FLUORIDE

CARBONYL SULFIDE

CHLORINE DIOXIDE, GAS

CHLORINE MONOXIDE

CHLORINE TRIFLUORIDE

CHLORINE, (LIQUEFIED)

CHLORINE, GAS

CHLOROFLUOROMETHANE

CHLOROMETHANE

CHLOROTETRAFLUOROETHANE

CHLOROTRIFLUOROETHYLENE

CHLOROTRIFLUOROMETHANE

CIS-2-BUTENE

CYANOGEN

CYANOGEN CHLORIDE

CYCLOPROPANE

DEUTERIUM BROMIDE, GAS

DEUTERIUM CHLORIDE, GAS

DEUTERIUM SULFIDE

DEUTERIUM, GAS

DIAZOMETHANE

DIBORANE

DIBROMODIFLUOROMETHANE

DICHLOROACETYLENE

DICHLORODIFLUOROMETHANE

DICHLOROFLUOROMETHANE

DICHLOROSILANE

DIMETHYLAMINE GAS

DIMETHYLSILANE

DIPHOSGENE

ETHANE, (LIQUEFIED)

ETHANE, GAS

ETHRANE

ETHYL ACETYLENE

ETHYL CHLORIDE

ETHYL FLUORIDE

ETHYL NITRITE

ETHYL-D5-AMINE

ETHYLENE

ETHYLENE OXIDE

ETHYLSILANE

FLUORINE

FLUOROMETHANE

FORMALDEHYDE, GAS

FREON 115

GERMANIUM HYDRIDE or GERMANE

HELIUM, (LIQUEFIED)

HELIUM, GAS

HEXACHLORO-1,3-BUTADIENE

HEXAFLUORO-2-BUTYNE

HEXAFLUOROACETONE

HEXAFLUOROCYCLOBUTENE

HEXAFLUOROETHANE

HEXAFLUOROPROPENE

HYDROGEN BROMIDE, GAS

HYDROGEN CHLORIDE, GAS

HYDROGEN CYANIDE, GAS

HYDROGEN FLUORIDE GAS

HYDROGEN GAS

HYDROGEN IODIDE, ANHYDROUS GAS

HYDROGEN SELENIDE GAS

HYDROGEN SULFIDE

HYDROGEN, (LIQUEFIED)

HYDROGEN-DEUTERIUM (1:1)

KETENE

KRYPTON

METHANE

METHANETHIOL

METHYL BROMIDE

METHYL CHLOROSILANE

METHYL ETHER

METHYLISOCYANATE

METHYL MERCAPTAN

METHYL VINYL ETHER

METHYLAMINE, ANHYDROUS

METHYLSILANE

MONOETHYLAMINE, ANHYDROUS

MUSTARD GAS

NATURAL GAS

NEON

NICKEL CARBONYL

NITROGEN

NITROGEN DIOXIDE, (LIQUEFIED)

NITROGEN DIOXIDE, GAS

NITROGEN DIOXIDE, GAS

NITROGEN MONOXIDE OR NITRIC OXIDE

NITROGEN TETROXIDE, (LIQUEFIED)

NITROGEN TETROXIDE, GAS

NITROGEN TRIFLUORIDE

NITROGEN TRIOXIDE

NITROSYL CHLORIDE

NITROUS ACID, ETHYL ESTER

NITROUS OXIDE

NITROUS OXIDE, (LIQUEFIED)

OCTAFLUOROCYCLOBUTANE

OXALYL BROMIDE

OXYGEN DIFLUORIDE

OXYGEN, GAS

OXYGEN, LIQUID

OZONE GAS

PARAFFIN HYDROCARBONS, GAS

PERCHLORYL FLUORIDE

PERFLUOROISOBUTYLENE

PERFLUOROPROPANE

PHOSGENE, GAS

PHOSPHINE

PHOSPHOROUS OXYCHLORIDE

PHOSPHORUS PENTAFLUORIDE

PHOSPHOROUS TRICHLORIDE

PHOSPHORUS TRIFLUORIDE

PROPANE

PROPANE, (LIQUEFIED)

PROPENE

PROPYNE

RADON

REFRIGERANT 22

SELENIUM HEXAFLUORIDE

SILANE, GAS

SILICON TETRACHLORIDE

SILICON TETRAFLUORIDE

STIBINE

SULFUR DIOXIDE

SULFUR HEXAFLUORIDE

SULFUR PENTAFLUORIDE

SULFUR TETRAFLUORIDE

SULFURYL FLUORIDE

TELLURIUM HEXAFLUORIDE

TETRAFLUOROETHYLENE

TITANIUM TETRACHLORIDE

TRANS-2-BUTENE

TRICHLOROMONOFLUOROMETHANE

TRIFLUOROACETYL CHLORIDE

TRIFLUOROMETHANE

TRIFLUOROMETHYL IODIDE

TRIFLUOROMETHYLHYPOFLUORITE

TRIMETHYLAMINE

TRITIUM

TUNGSTEN HEXAFLUORIDE

VINYL ACETYLENE

VINYL BROMIDE

VINYL CHLORIDE

VINYL FLUORIDE

XENON

XENON, (LIQUEFIED)

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