Ethyldichlorosilane

Substance Data

Source: PubChem (HSDB, 15.12.2019)

CAS-Number

1789-58-8

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 139

Data from the Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

Packing Group I
Packing Group II
Packing Group III

(3) Hazard Class

4.3
Dangerous when wet materials

(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.

Single packagings are not permitted on aircraft.

Browse special provision A2

Steel packagings must be corrosion-resistant or have protection against corrosion.

Browse special provision A7

N34

Aluminum construction materials are not authorized for any part of a packaging which is normally in contact with the hazardous material.

Browse special provision N34

T14

Minimum test pressure (bar)	6
Minimum shell thickness	6 mm
Pressure-relief requirements	§ 178.275(g)(3)
Bottom opening requirements	Prohibited

Browse special provision T14

TP2

a. The maximum degree of filling must not exceed the degree of filling determined by the following:
TP2a

Where:
t_r is the maximum mean bulk temperature during transport,
t_f is the temperature in degrees celsius of the liquid during filling, and
α is the mean coefficient of cubical expansion of the liquid between the mean temperature of the liquid during filling (t_f) and the maximum mean bulk temperature during transportation (t_r) both in degrees celsius.
b. For liquids transported under ambient conditions α may be calculated using the formula:
TP2b

Where:
d₁₅ and d₅₀ 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

TP7

The vapor space must be purged of air by nitrogen or other means.

Browse special provision TP7

TP13

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

Browse special provision TP13

W31

Non-bulk packagings must be hermetically sealed.

Browse special provision W31

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	201	see 49 CFR §173.201
(8C) Bulk	244	see 49 CFR §173.244

(9) Quantity Limits

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

(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

21	see 49 CFR §176.84
40	see 49 CFR §176.84
49	see 49 CFR §176.84
53	see 49 CFR §176.84
58	see 49 CFR §176.84
100	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard Class

4.3
Dangerous when wet materials

(4) Identification number

UN 1242

(5) Packing Group

Comparison View of PG

(6) Labels

Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102)

Single packagings are not permitted on aircraft.

Browse special provision A2

Steel packagings must be corrosion-resistant or have protection against corrosion.

Browse special provision A7

Packagings shall be made of steel.

Browse special provision B6

B77

Other packaging are authorized when approved by the Associate Administrator.

Browse special provision B77

N34

Aluminum construction materials are not authorized for any part of a packaging which is normally in contact with the hazardous material.

Browse special provision N34

T14

Minimum test pressure (bar)	6
Minimum shell thickness	6 mm
Pressure-relief requirements	§ 178.275(g)(3)
Bottom opening requirements	Prohibited

Browse special provision T14

TP2

a. The maximum degree of filling must not exceed the degree of filling determined by the following:
TP2a

Where:
d₁₅ and d₅₀ 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

TP7

The vapor space must be purged of air by nitrogen or other means.

Browse special provision TP7

TP13

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

Browse special provision TP13

W31

Non-bulk packagings must be hermetically sealed.

Browse special provision W31

(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	Forbidden
(9B) Cargo aircraft only	1 L

(10) Vessel stowage

(10A) Location

Source: 49 CFR §172.101(k)

(10B) Other

21	see 49 CFR §176.84
40	see 49 CFR §176.84
49	see 49 CFR §176.84
53	see 49 CFR §176.84
58	see 49 CFR §176.84
100	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard Class

8
Corrosive liquids

(4) Identification number

UN 1767

(5) Packing Group

Comparison View of PG

(6) Labels

(7) Special Provisions (§172.102)

Steel packagings must be corrosion-resistant or have protection against corrosion.

Browse special provision A7

Packagings shall be made of steel.

Browse special provision B6

N34

Aluminum construction materials are not authorized for any part of a packaging which is normally in contact with the hazardous material.

Browse special provision N34

T10

Minimum test pressure (bar)	4
Minimum shell thickness	6 mm
Pressure-relief requirements	§ 178.275(g)(3)
Bottom opening requirements	Prohibited

Browse special provision T10

TP2

a. The maximum degree of filling must not exceed the degree of filling determined by the following:
TP2a

Where:
d₁₅ and d₅₀ 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

TP7

The vapor space must be purged of air by nitrogen or other means.

Browse special provision TP7

TP13

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

Browse special provision TP13

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	206	see 49 CFR §173.206
(8C) Bulk	243	see 49 CFR §173.243

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location

Stowage category “C” means the material must be stowed “on deck only” on a cargo vessel or on a passenger vessel.

Source: 49 CFR §172.101(k)

(10B) Other

40	see 49 CFR §176.84
53	see 49 CFR §176.84
58	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard Class

3
Flammable liquids

(4) Identification number

UN 1162

(5) Packing Group

Comparison View of PG

(6) Labels

(7) Special Provisions (§172.102)

B77

Other packaging are authorized when approved by the Associate Administrator.

Browse special provision B77

T10

Minimum test pressure (bar)	4
Minimum shell thickness	6 mm
Pressure-relief requirements	§ 178.275(g)(3)
Bottom opening requirements	Prohibited

Browse special provision T10

TP2

a. The maximum degree of filling must not exceed the degree of filling determined by the following:
TP2a

Where:
d₁₅ and d₅₀ 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

TP7

The vapor space must be purged of air by nitrogen or other means.

Browse special provision TP7

TP13

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

Browse special provision TP13

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	206	see 49 CFR §173.206
(8C) Bulk	243	see 49 CFR §173.243

(9) Quantity Limits

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

(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

Comparison View of Different Packing Groups

More than one packing group is indicated for this entry. Criteria for assignment see 49 CFR §173 Subpart D. You can find specific details in the tabs above. Differences are highlighted.

	PG I	PG I	PG II	PG II
1
2	Ethyldichlorosilane	Methyldichlorosilane	Diethyldichlorosilane	Dimethyldichlorosilane
3	4.3	4.3	8	3
4	UN 1183	UN 1242	UN 1767	UN 1162
5	I	I	II	II
6	4.3, 8, 3	4.3, 8, 3	8, 3	3, 8
7	A2, A7, N34, T14, TP2, TP7, TP13, W31	A2, A7, B6, B77, N34, T14, TP2, TP7, TP13, W31	A7, B6, N34, T10, TP2, TP7, TP13	B77, T10, TP2, TP7, TP13
8A	None	None	None	None
8B	201	201	206	206
8C	244	243	243	243
9A	Forbidden	Forbidden	Forbidden	Forbidden
9B	1 L	1 L	30 L	Forbidden
10A	D	D	C	B
10B	21, 40, 49, 53, 58, 100	21, 40, 49, 53, 58, 100	40, 53, 58	40

Segregation Chart for Load, Transport, Storage

In this table a statement is contained for each hazard class whether the loading, transport or storage with other hazard classes is allowed, is not permitted or is restricted. The table is based on U.S.-Code 49 CFR §177.848.

Hazard Class	8	7	6.1	5.2	5.1	4.3	4.2	4.1	3	2.3B	2.3A	2.2	2.1	1.6	1.5	1.4	1.3	1.1/1.2
1.1/1.2
1.3
1.4
1.5
1.6
2.1
2.2
2.3A
2.3B
3
4.1
4.2
4.3
5.1
5.2
6.1
7
8

	May not be loaded, transported, or stored together in the same transport vehicle or storage facility.
	Load, transport, storage together is not restricted.
	Load, transport, storage together is allowed under restrictions.

Substances with similar name

UN-Number	Name	Hazard Class
UN 2986	Chlorosilanes, corrosive, flammable, n.o.s	8
UN 2987	Chlorosilanes, corrosive, n.o.s	8
UN 3362	Chlorosilanes, toxic, corrosive, flammable, n.o.s	6.1
UN 3361	Chlorosilanes, toxic, corrosive, n.o.s	6.1
UN 2988	Chlorosilanes, water-reactive, flammable, corrosive, n.o.s	4.3
UN 1762	Cyclohexenyltrichlorosilane	8
UN 1763	Cyclohexyltrichlorosilane	8
UN 2434	Dibenzyldichlorosilane	8
UN 1766	Dichlorophenyltrichlorosilane	8
UN 2189	Dichlorosilane	2.3
UN 1767	Diethyldichlorosilane	8
UN 1183	Ethyldichlorosilane	4.3
UN 1196	Ethyltrichlorosilane	3
UN 1781	Hexadecyltrichlorosilane	8
UN 2534	Methylchlorosilane	2.3
UN 2437	Methylphenyldichlorosilane	8
UN 1295	Trichlorosilane	4.3