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Toxic liquids, corrosive, organic, n.o.s.

HMT 15 June 2026

UN / ID: UN 2927
Hazard class: 6.1
Packing group: I (multiple — see tabs)
ERG guide: ERG 154
Special provisions: SP T14, SP TP2, SP TP13, SP TP27
Source: 49 CFR §172 (15 June 2026)

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Toxic liquids, corrosive, organic, n.o.s.

Toxic or poisonous material is a material, other than a gas, known to be so toxic to humans that it presents a health hazard during transportation More Information

Emergency Response Guide No. 154

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

Packing group I
Packing group II

(3) Hazard class

6.1
Poisonous Material

This entry is signed with "G". The letter "G" identifies proper shipping names for which one or more technical names of the hazardous material must be entered in parentheses, in association with the basic description. (See §172.203(k)).

(7) Special Provisions (§172.102)

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.

T14	<table class="table table-bordered table-condensed ushmr-sp-table"><tr><th>Minimum test pressure (bar)</th><td>6</td></tr><tr><th>Minimum shell thickness</th><td>6 mm</td></tr><tr><th>Pressure-relief requirements</th><td>§ 178.275(g)(3)</td></tr><tr><th>Bottom opening requirements</th><td>Prohibited</td></tr></table> Browse special provision T14
TP2	a. The maximum degree of filling must not exceed the degree of filling determined by the following:<br><br>Where: <br>t<sub>r</sub> is the maximum mean bulk temperature during transport, <br>t<sub>f</sub> is the temperature in degrees celsius of the liquid during filling, and <br>α is the mean coefficient of cubical expansion of the liquid between the mean temperature of the liquid during filling (t<sub>f</sub>) and the maximum mean bulk temperature during transportation (t<sub>r</sub>) both in degrees celsius. <br>b. For liquids transported under ambient conditions α may be calculated using the formula:<br><br>Where: <br>d<sub>15</sub> and d<sub>50</sub> are the densities (in units of mass per unit volume) of the liquid at 15 °C (59 °F) and 50 °C (122 °F), respectively. Browse special provision TP2
TP13	Self-contained breathing apparatus must be provided when this hazardous material is transported by sea. Browse special provision TP13
TP27	A portable tank having a minimum test pressure of 4 bar (400 kPa) may be used provided the calculated test pressure is 4 bar or less based on the MAWP of the hazardous material, as defined in § 178.275 of this subchapter, where the test pressure is 1.5 times the MAWP. Browse special provision TP27

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	201	see 49 CFR §173.201
(8C) Bulk	243	see 49 CFR §173.243

(9) Quantity Limits

(9A) Passenger aircraft/rail	0.5 L
(9B) Cargo aircraft only	2.5 L

(10) Vessel stowage

(10A) Location

Stowage category “B” means

(i) The material may be stowed “on deck” or “under deck” on a cargo vessel and on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers, or one passenger per each 3 m of overall vessel length; and
(ii) “On deck only” on passenger vessels in which the number of passengers specified in paragraph (k)(2)(i) of this section is exceeded.

Source: 49 CFR §172.101(k)

(10B) Other

40	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard class

6.1
Poisonous Material

(4) Identification number

UN 2927

(5) Packing Group

Comparison View of PG

(6) Labels

(1) Symbols

(7) Special Provisions (§172.102)

IB2	<sub>Authorized IBCs:</sub> Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1).<br><sub>Additional Requirement:</sub> Only liquids with a vapor pressure less than or equal to 110 kPa at 50 °C (1.1 bar at 122 °F), or 130 kPa at 55 °C (1.3 bar at 131 °F) are authorized. Browse special provision IB2
T11	<table class="table table-bordered table-condensed ushmr-sp-table"><tr><th>Minimum test pressure (bar)</th><td>6</td></tr><tr><th>Minimum shell thickness</th><td>§ 178.274(d)(2)</td></tr><tr><th>Pressure-relief requirements</th><td>Normal</td></tr><tr><th>Bottom opening requirements</th><td>§ 178.275(d)(3)</td></tr></table> Browse special provision T11
TP2	a. The maximum degree of filling must not exceed the degree of filling determined by the following:<br><br>Where: <br>t<sub>r</sub> is the maximum mean bulk temperature during transport, <br>t<sub>f</sub> is the temperature in degrees celsius of the liquid during filling, and <br>α is the mean coefficient of cubical expansion of the liquid between the mean temperature of the liquid during filling (t<sub>f</sub>) and the maximum mean bulk temperature during transportation (t<sub>r</sub>) both in degrees celsius. <br>b. For liquids transported under ambient conditions α may be calculated using the formula:<br><br>Where: <br>d<sub>15</sub> and d<sub>50</sub> are the densities (in units of mass per unit volume) of the liquid at 15 °C (59 °F) and 50 °C (122 °F), respectively. Browse special provision TP2
TP27	A portable tank having a minimum test pressure of 4 bar (400 kPa) may be used provided the calculated test pressure is 4 bar or less based on the MAWP of the hazardous material, as defined in § 178.275 of this subchapter, where the test pressure is 1.5 times the MAWP. Browse special provision TP27

(8) Packing Authorizations (§173.***)

(8A) Exceptions	153	see 49 CFR §173.153
(8B) Non-bulk	202	see 49 CFR §173.202
(8C) Bulk	243	see 49 CFR §173.243

(9) Quantity Limits

(9A) Passenger aircraft/rail	1 L
(9B) Cargo aircraft only	30 L

(10) Vessel stowage

(10A) Location

Stowage category “B” means

(i) The material may be stowed “on deck” or “under deck” on a cargo vessel and on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers, or one passenger per each 3 m of overall vessel length; and
(ii) “On deck only” on passenger vessels in which the number of passengers specified in paragraph (k)(2)(i) of this section is exceeded.

Source: 49 CFR §172.101(k)

(10B) Other

40	see 49 CFR §176.84

Source: 49 CFR §176.84

Packing group comparison

Multiple packing groups apply to this entry. See assignment criteria in 49 CFR §173 Subpart D. Details are in the tabs above; differences are highlighted.

	PG I	PG II
1	G	G
2	Toxic liquids, corrosive, organic, n.o.s.	Toxic liquids, corrosive, organic, n.o.s.
3	6.1	6.1
4	UN 2927	UN 2927
5	I	II
6	6.1, 8	6.1, 8
7	T14, TP2, TP13, TP27	IB2, T11, TP2, TP27
8A	None	153
8B	201	202
8C	243	243
9A	0.5 L	1 L
9B	2.5 L	30 L
10A	B	B
10B	40	40

Segregation chart for load, transport, and storage

This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.

Hinweis: In der Kompatibilitätstabelle sind Stoffe der Gefahrenklasse 6.1 nur dann gesondert zu berücksichtigen, wenn der Stoff als inhalativ giftig (Gefahrenzone A) sowie in der Verpackungsgruppe I eingestuft ist. Siehe Sonderbestimmung 1 sowie PHMSA Interpretation #09-0252.

Packages with POISON or POISON INHALATION HAZARD labels, or a POISON label displaying “PG III,” or “PG III” marked next to a POISON label may not be transported with foodstuffs, feed or any other edible material, intended for humans or animals. For exceptions see 49 CFR §177.841(e).

Scope & sources (important)Click to show CFR references

This check evaluates segregation per 49 CFR §177.848. Additional loading/unloading and handling requirements may still apply; see 49 CFR §177 Subpart B (Loading and Unloading):

§177.834 - General requirements
§177.835 - Class 1 materials
§177.837 - Class 3 materials
§177.838 - Class 4 (flammable solid) materials, Class 5 (oxidizing) materials, and Division 4.2 (pyroforic liquid) materials
§177.839 - Class 8 (corrosive) materials
§177.840 - Class 2 (gases) materials
§177.841 - Division 6.1 and Division 2.3 materials
§177.842 - Class 7 (radioactive) material
§177.843 - Contamination of vehicles

Similar substances

UN / ID	Proper shipping name	Hazard class
UN 3516	Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone A	2.3
UN 3516	Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone B	2.3
UN 3516	Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone C	2.3
UN 3516	Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone D	2.3
UN 3308	Liquefied gas, toxic, corrosive, n.o.s. Inhalation Hazard Zone C	2.3
UN 3308	Liquefied gas, toxic, corrosive, n.o.s. Inhalation Hazard Zone D	2.3
UN 2742	Chloroformates, toxic, corrosive, flammable, n.o.s	6.1
UN 3362	Chlorosilanes, toxic, corrosive, flammable, n.o.s	6.1
UN 3505	Chemical under pressure, flammable, corrosive, n.o.s	2.1
UN 3264	Corrosive liquid, acidic, inorganic, n.o.s	8
UN 3266	Corrosive liquid, basic, inorganic, n.o.s	8
UN 2922	Corrosive liquids, toxic, n.o.s.	8
UN 3260	Corrosive solid, acidic, inorganic, n.o.s	8
UN 1774	Fire extinguisher charges, corrosive liquid	8
UN 3094	Corrosive liquids, water-reactive, n.o.s	8