Tetraethyl dithiopyrophosphate
HMT 15 June 2026- UN / ID
- UN 1704
- Hazard class
- 6.1
- Packing group
- II
- ERG guide
- ERG 153
- Special provisions
- SP IB2, SP T7, SP TP2
- Source
- 49 CFR §172 (15 June 2026)
Tetraethyl dithiopyrophosphate
Sulfotep (also known as tetraethyldithiopyrophosphate and TEDP) is a pesticide commonly used in greenhouses as a fumigant. The substance is also known as Dithione, Dithiophos, and many other names. Sulfotep has the molecular formula C8H20O5P2S2 and belongs to the organophosphate class of chemicals. It has a cholinergic effect, involving depression of the cholinesterase activity of the peripheral and central nervous system of insects Wikipedia
Substance Data
Source: PubChem (HSDB, 26.11.2019)CAS-Number3689-24-5 |
Flash Pointn/a | Boiling Pointn/a |
| Emergency Response Guide No. 153 |
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(3) Hazard Class6.1Poisonous Material |
(4) Identification number |
(5) Packing Group |
|||||||||
(6) Labels |
|||||||||||
(7) Special Provisions (§172.102)
|
|||||||||||
| IB2 | |
|---|---|
| T7 | |
| TP2 |
(8) Packing Authorizations (§173.***) 
| (8A) Exceptions | 153 | see 49 CFR §173.153 |
|---|---|---|
| (8B) Non-bulk | 212 | see 49 CFR §173.212 |
| (8C) Bulk | 242 | see 49 CFR §173.242 |
(9) Quantity Limits 
| (9A) Passenger aircraft/rail | 25 kg |
|---|---|
| (9B) Cargo aircraft only | 100 kg |
(10) Vessel stowage 
| (10A) Location | |
|---|---|
| (10B) Other |
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.
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

