Special Provision T20 — 49 CFR 172.102 (T-Codes)

Code

T20

Description

Minimum test pressure (bar)	10
Minimum shell thickness	8 mm
Pressure-relief requirements	§ 178.275(g)(3)
Bottom opening requirements	Prohibited

HazMat with this Code

UN 2232 - 2-Chloroethanal
UN 3023 - 2-Methyl-2-heptanethiol
NA9264 - 3,5-Dichloro-2,4,6-trifluoropyridine
UN 1541 - Acetone cyanohydrin, stabilized
UN 1098 - Allyl alcohol
UN 1722 - Allyl chloroformate
UN 2334 - Allylamine
UN 1553 - Arsenic acid, liquid
UN 1560 - Arsenic trichloride
UN 2692 - Boron tribromide
UN 1569 - Bromoacetone
UN 1695 - Chloroacetone, stabilized
UN 2668 - Chloroacetonitrile
UN 1752 - Chloroacetyl chloride
NA9263 - Chloropivaloyl chloride
UN 1754 - Chlorosulfonic acid (with or without sulfur trioxide)
UN 1143 - Crotonaldehyde or Crotonaldehyde, stabilized
UN 2488 - Cyclohexyl isocyanate
UN 2521 - Diketene, stabilized
UN 1595 - Dimethyl sulfate
UN 2382 - Dimethylhydrazine, symmetrical
UN 1163 - Dimethylhydrazine, unsymmetrical
UN 1182 - Ethyl chloroformate
UN 2826 - Ethyl chlorothioformate
UN 2481 - Ethyl isocyanate
NA2927 - Ethyl phosphonothioic dichloride, anhydrous
NA2845 - Ethyl phosphonous dichloride, anhydrous pyrophoric liquid
NA2927 - Ethyl phosphorodichloridate
UN 1892 - Ethyldichloroarsine
UN 1135 - Ethylene chlorohydrin
UN 1605 - Ethylene dibromide
UN 2646 - Hexachlorocyclopentadiene
UN 1613 - Hydrocyanic acid, aqueous solutions or Hydrogen cyanide, aqueous solutions with not more than 20 percent hydrogen cyanide
UN 3294 - Hydrogen cyanide, solution in alcohol with not more than 45 percent hydrogen cyanide
UN 2486 - Isobutyl isocyanate
UN 2407 - Isopropyl chloroformate
UN 2483 - Isopropyl isocyanate
UN 3079 - Methacrylonitrile, stabilized
UN 3246 - Methanesulfonyl chloride
UN 2605 - Methoxymethyl isocyanate
UN 1647 - Methyl bromide and ethylene dibromide mixtures, liquid
UN 2644 - Methyl iodide
UN 2477 - Methyl isothiocyanate
UN 2606 - Methyl orthosilicate
NA9206 - Methyl phosphonic dichloride
NA2845 - Methyl phosphonous dichloride, pyrophoric liquid
NA1556 - Methyldichloroarsine
UN 2743 - n-Butyl chloroformate
UN 2485 - n-Butyl isocyanate
UN 2740 - n-Propyl chloroformate
UN 2482 - n-Propyl isocyanate
UN 2032 - Nitric acid, red fuming
UN 1670 - Perchloromethyl mercaptan
UN 2487 - Phenyl isocyanate
UN 2337 - Phenyl mercaptan
UN 1672 - Phenylcarbylamine chloride
UN 1810 - Phosphorus oxychloride
UN 1809 - Phosphorus trichloride
UN 1828 - Sulfur chlorides
UN 1829 - Sulfur trioxide, stabilized
UN 1831 - Sulfuric acid, fuming with 30 percent or more free sulfur trioxide
UN 1831 - Sulfuric acid, fuming with less than 30 percent free sulfur trioxide
UN 2484 - tert-Butyl isocyanate
UN 1510 - Tetranitromethane
UN 2474 - Thiophosgene
UN 1838 - Titanium tetrachloride
UN 3390 - Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50
UN 3489 - Toxic by inhalation liquid, flammable, corrosive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50
UN 3384 - Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50
UN 3382 - Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50
UN 3388 - Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50
UN 3491 - Toxic by inhalation liquid, water-reactive, flammable, n.o.s. with an LC50 lower or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50
UN 3386 - Toxic by inhalation liquid, water-reactive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50
UN 2442 - Trichloroacetyl chloride
NA9269 - Trimethoxysilane
UN 2438 - Trimethylacetyl chloride

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