HazMat Tool — substance information

Ethyl phosphonothioic dichloride, anhydrous

HMT May 2026

UN / ID: NA 2927
Hazard class: 6.1
Packing group: I (multiple — see tabs)
ERG guide: —
Special provisions: SP 2, SP B9, SP B14, SP B32, SP T20, SP TP4, SP TP12, SP TP13, more…
Source: 49 CFR §172 (2026/05)

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Ethyl phosphonothioic dichloride, anhydrous

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

Packing group I
Packing group II

(3) Hazard Class

6.1
Poisonous Material

This entry is signed with "D". The letter "D" identifies proper shipping names which are appropriate for describing materials for domestic transportation but may be inappropriate for international transportation under the provisions of international regulations (e.g., IMO, ICAO). An alternate proper shipping name may be selected when either domestic or international transportation is involved.

(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.

This material is poisonous by inhalation (see §171.8) in Hazard Zone B (see §173.116 or §173.133), and must be described as an inhalation hazard under the provisions of this subchapter.

Browse special provision 2

Bottom outlets are not authorized.

Browse special provision B9

B14

Each bulk packaging, except a tank car or a multi-unit-tank car tank, must be insulated with an insulating material so that the overall thermal conductance at 15.5 °C (60 °F) is no more than 1.5333 kilojoules per hour per square meter per degree Celsius (0.075 Btu per hour per square foot per degree Fahrenheit) temperature differential. Insulating materials must not promote corrosion to steel when wet.

Browse special provision B14

B32

MC 312, MC 330, MC 331, DOT 412 cargo tanks and DOT 51 portable tanks must be made of stainless steel, except that steel other than stainless steel may be used in accordance with the provisions of §173.24b. Thickness of stainless steel for tank shell and heads for cargo tanks and portable tanks must be the greater of 6.35 mm (0.250 inch) or the thickness required for a tank with a design pressure at least equal to 1.3 times the vapor pressure of the lading at 46 °C (115 °F). In addition, MC 312 and DOT 412 cargo tank motor vehicles must:
a. Be ASME Code (U) stamped for 100% radiography of all pressure-retaining welds;
b. Have accident damage protection which conforms with §178.345-8;
c. Have a MAWP or design pressure of at least 87 psig; and
d. Have a bolted manway cover.

Browse special provision B32

T20

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

Browse special provision T20

TP4

The maximum degree of filling for portable tanks must not exceed 90%.

Browse special provision TP4

TP12

This material is considered highly corrosive to steel.

Browse special provision TP12

TP13

Self-contained breathing apparatus must be provided when this hazardous material is transported by sea.

Browse special provision TP13

TP38

Each portable tank must be insulated with an insulating material so that the overall thermal conductance at 15.5 °C (60 °F) is no more than 1.5333 kilojoules per hour per square meter per degree Celsius (0.075 Btu per hour per square foot per degree Fahrenheit) temperature differential. Insulating materials may not promote corrosion to steel when wet.

Browse special provision TP38

TP45

Each portable tank must be made of stainless steel, except that steel other than stainless steel may be used in accordance with the provisions of 173.24b(b) of this subchapter. Thickness of stainless steel for portable tank shells and heads must be the greater of 6.35 mm (0.250 inch) or the thickness required for a portable tank with a design pressure at least equal to 1.3 times the vapor pressure of the hazardous material at 46 °C (115 °F).

Browse special provision TP45

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	227	see 49 CFR §173.227
(8C) Bulk	244	see 49 CFR §173.244

(9) Quantity Limits

(9A) Passenger aircraft/rail	Forbidden
(9B) Cargo aircraft only	Forbidden

(10) Vessel stowage

(10A) Location

Stowage category “D” means the material must be stowed “on deck only” on a cargo vessel or 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, but the material is prohibited on a passenger vessel in which the limiting number of passengers 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

NA 2927

(5) Packing Group

Comparison View of PG

(6) Labels

(1) Symbols

(7) Special Provisions (§172.102)

This material is poisonous by inhalation (see §171.8) in Hazard Zone B (see §173.116 or §173.133), and must be described as an inhalation hazard under the provisions of this subchapter.

Browse special provision 2

Bottom outlets are not authorized.

Browse special provision B9

B14

Browse special provision B14

B32

Browse special provision B32

T20

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

Browse special provision T20

TP4

The maximum degree of filling for portable tanks must not exceed 90%.

Browse special provision TP4

TP12

This material is considered highly corrosive to steel.

Browse special provision TP12

TP13

Self-contained breathing apparatus must be provided when this hazardous material is transported by sea.

Browse special provision TP13

TP38

Browse special provision TP38

TP45

Browse special provision TP45

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	227	see 49 CFR §173.227
(8C) Bulk	244	see 49 CFR §173.244

(9) Quantity Limits

(9A) Passenger aircraft/rail	Forbidden
(9B) Cargo aircraft only	Forbidden

(10) Vessel stowage

(10A) Location

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 I
1	D	D
2	Ethyl phosphonothioic dichloride, anhydrous	Ethyl phosphorodichloridate
3	6.1	6.1
4	NA 2927	NA 2927
5	I	I
6	6.1, 8	6.1, 8
7	2, B9, B14, B32, T20, TP4, TP12, TP13, TP38, TP45	2, B9, B14, B32, T20, TP4, TP12, TP13, TP38, TP45
8A	None	None
8B	227	227
8C	244	244
9A	Forbidden	Forbidden
9B	Forbidden	Forbidden
10A	D	D
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.

Note: The HMR prohibit only those Division 6.1 liquids that meet the definition of a Packing Group (PG) I and Hazard Zone A. See special provision 1 and 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

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UN 3017	Organophosphorus pesticides, liquid, toxic, flammable, flash point not less than 23 degrees C	6.1
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UN 2784	Organophosphorus pesticides, liquid, flammable, toxic, flash point less than 23 degrees C	3
UN 0245	Ammunition smoke, white phosphorus with burster, expelling charge, or propelling charge	1.2H
UN 0243	Ammunition, incendiary, white phosphorus, with burster, expelling charge or propelling charge	1.2H
UN 0244	Ammunition, incendiary, white phosphorus, with burster, expelling charge or propelling charge	1.3H
UN 0246	Ammunition, smoke, white phosphorus with burster, expelling charge, or propelling charge	1.3H
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UN 1339	Phosphorus heptasulfide, free from yellow or white phosphorus	4.1
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UN 1341	Phosphorus sesquisulfide, free from yellow or white phosphorus	4.1
UN 1343	Phosphorus trisulfide, free from yellow or white phosphorus	4.1