HazMat Tool — substance information
Reference only — not a shipping paper, placard mandate, or CVI record.
Ethyldichlorosilane
HMT 15 June 2026Ethyldichlorosilane
Substance Data
Source: PubChem (HSDB, 15.12.2019)CAS-Number1789-58-8 |
Flash Point— | Boiling Point— |
| Emergency Response Guide No. 139 |
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(3) Hazard class4.3Dangerous when wet materials |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(7) Special Provisions (§172.102)
|
||||||||||||||||||
| A2 | |
|---|---|
| A7 | |
| N34 | |
| T14 | |
| TP2 | |
| TP7 | |
| TP13 | |
| 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 | |
|---|---|
| (10B) Other |
(3) Hazard class4.3Dangerous when wet materials |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(7) Special Provisions (§172.102)
|
||||||||||||||||||||||
| A2 | |
|---|---|
| A7 | |
| B6 | |
| B77 | |
| N34 | |
| T14 | |
| TP2 | |
| TP7 | |
| TP13 | |
| 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 | |
|---|---|
| (10B) Other |
(3) Hazard class8Corrosive liquids |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(7) Special Provisions (§172.102)
|
||||||||||||||||
| A7 | |
|---|---|
| B6 | |
| N34 | |
| T10 | |
| TP2 | |
| TP7 | |
| 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 | |
|---|---|
| (10B) Other |
(3) Hazard class3Flammable liquids |
(4) Identification number |
(5) Packing Group |
||||||||||
(6) Labels |
||||||||||||
(7) Special Provisions (§172.102)
|
||||||||||||
| B77 | |
|---|---|
| T10 | |
| TP2 | |
| TP7 | |
| 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 | |
|---|---|
| (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 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, 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![]() | 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![]() |
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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 ![]() |
| Must not be loaded, transported, or stored together in the same vehicle or facility. | |
| May be loaded, transported, or stored together. | |
| May be loaded, transported, or stored together only with restrictions. |

