HazMat Tool — substance information

Trichlorosilane

HMT 15 June 2026
Reference only — HMT snapshot for inspection and audit support; not a shipping paper, placard mandate, or CVI record. Use Print / PDF below for field notes.
UN / ID
UN 1295
Hazard class
4.3
Packing group
I (multiple — see tabs)
ERG guide
ERG 139
Special provisions
SP N34, SP T14, SP TP2, SP TP7, SP TP13, SP W31
Source
49 CFR §172 (15 June 2026)

Spot an error in this entry?

Trichlorosilane


Trichlorosilane (TCS) is an inorganic compound with the formula HCl3Si. It is a colourless, volatile liquid. Purified trichlorosilane is the principal precursor to ultrapure silicon in the semiconductor industry. In water, it rapidly decomposes to produce a siloxane polymer while giving off hydrochloric acid Wikipedia

Substance Data

Source: PubChem (HSDB, 19.11.2019)

CAS-Number

10025-78-2

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 139

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

4.3
Dangerous when wet materials

(4) Identification number Help

UN 1295

(5) Packing Group Help

I
Comparison View of PG

(6) Labels Help

Dangerous when wet materials (4.3) Flammable liquids (3) Corrosive liquids (8)

(7) Special Provisions (§172.102) Help

×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.
N34
T14
TP2
TP7
TP13
W31

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk201see 49 CFR §173.201
(8C) Bulk244see 49 CFR §173.244

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft onlyForbidden

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1728

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1747

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Flammable liquids (3) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk243see 49 CFR §173.243

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1753

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1762

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1763

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1766

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1771

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

3
Flammable liquids

(4) Identification number Help

UN 1196

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Flammable liquids (3) Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk243see 49 CFR §173.243

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only5 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1781

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1784

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

3
Flammable liquids

(4) Identification number Help

UN 1250

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Flammable liquids (3) Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B6
B77
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk243see 49 CFR §173.243

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only5 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1799

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1800

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1801

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1804

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 1816

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Corrosive liquids (8) Flammable liquids (3) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A7
B2
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk243see 49 CFR §173.243

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

3
Flammable liquids

(4) Identification number Help

UN 1305

(5) Packing Group Help

II
Comparison View of PG

(6) Labels Help

Flammable liquids (3) Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×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.
A3
A7
B6
N34
T10
TP2
TP7
TP13

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk206see 49 CFR §173.206
(8C) Bulk243see 49 CFR §173.243

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only5 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

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 PG II PG II PG II PG II PG II PG II PG II PG II PG II PG II PG II PG II PG II PG II PG II PG II
1
2TrichlorosilaneAmyltrichlorosilaneButyltrichlorosilaneChlorophenyltrichlorosilaneCyclohexenyltrichlorosilaneCyclohexyltrichlorosilaneDichlorophenyltrichlorosilaneDodecyltrichlorosilaneEthyltrichlorosilaneHexadecyltrichlorosilaneHexyltrichlorosilaneMethyltrichlorosilaneNonyltrichlorosilaneOctadecyltrichlorosilaneOctyltrichlorosilanePhenyltrichlorosilanePropyltrichlorosilaneVinyltrichlorosilane
34.388888883883888883
4UN 1295UN 1728UN 1747UN 1753UN 1762UN 1763UN 1766UN 1771UN 1196UN 1781UN 1784UN 1250UN 1799UN 1800UN 1801UN 1804UN 1816UN 1305
5IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
64.3, 3, 888, 3888883, 8883, 888888, 33, 8
7N34, T14, TP2, TP7, TP13, W31A7, B2, B6, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7A7, B2, N34, T10, TP2, TP7, TP13A7, B2, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7, TP13A7, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7, TP13A7, B6, B77, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7, TP13A7, B6, N34, T10, TP2, TP7, TP13A7, B2, B6, N34, T10, TP2, TP7, TP13A3, A7, B6, N34, T10, TP2, TP7, TP13
8ANoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNone
8B201206206206206206206206206206206206206206206206206206
8C244242243242242242242242243242242243242242242242243243
9AForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbiddenForbidden
9BForbidden30 L30 L30 L30 L30 L30 L30 L5 L30 L30 L5 L30 L30 L30 L30 L30 L5 L
10ADCCCCCCCBCCBCCCCCB
10B21, 40, 49, 53, 58, 10040, 53, 5840, 53, 5840, 53, 5840, 53, 5840, 53, 5840, 53, 5840, 53, 584040, 53, 5840, 53, 5840, 53, 5840, 53,40, 53, 5840, 53, 5840, 53, 5840, 53, 5840, 53, 58

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.

Hazard
class		8
 Help		7
 Help		6.1
 Help		5.2
 Help		5.1
 Help		4.3
 Help		4.2
 Help		4.1
 Help		3
 Help		2.3B
 Help		2.3A
 Help		2.2
 Help		2.1
 Help		1.6
 Help		1.5
 Help		1.4
 Help		1.3
 Help		1.1/1.2
 Help
1.1/1.2 Help
1.3 Help
1.4 Help
1.5 Help
1.6 Help
2.1 Help
2.2 Help
2.3A Help
2.3B Help
3 Help
4.1 Help
4.2 Help
4.3 Help
5.1 Help
5.2 Help
6.1 Help
7 Help
8 Help
Prohibited Must not be loaded, transported, or stored together in the same vehicle or facility.
Permitted May be loaded, transported, or stored together.
Restricted May be loaded, transported, or stored together only with restrictions.