HazMat Tool — substance information

Diisopropyl ether

HMT 15 June 2026

UN / ID: UN 1159
Hazard class: 3
Packing group: II
ERG guide: ERG 127
Special provisions: SP IB2, SP T4, SP TP1
Source: 49 CFR §172 (15 June 2026)

On this page

Diisopropyl ether

Diisopropyl ether is a secondary ether that is used as a solvent. It is a colorless liquid that is slightly soluble in water, but miscible with organic solvents. It is also used as an oxygenate gasoline additive. It is obtained industrially as a byproduct in the production of isopropanol by hydration of propylene Wikipedia

Substance Data

Source: PubChem (HSDB, 14.12.2019)

CAS-Number

108-20-3

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 127

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

3
Flammable liquids

(4) Identification number

UN 1159

(5) Packing Group

(6) Labels

(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.

IB2

_{Authorized IBCs:} Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1).
_{Additional Requirement:} Only liquids with a vapor pressure less than or equal to 110 kPa at 50 °C (1.1 bar at 122 °F), or 130 kPa at 55 °C (1.3 bar at 131 °F) are authorized.

Browse special provision IB2

Minimum test pressure (bar)	2.65
Minimum shell thickness	§ 178.274(d)(2)
Pressure-relief requirements	Normal
Bottom opening requirements	§ 178.275(d)(3)

Browse special provision T4

TP1

The maximum degree of filling must not exceed the degree of filling determined by the following:
TP1

Where:
t_r is the maximum mean bulk temperature during transport, and t_f is the temperature in degrees celsius of the liquid during filling.

Browse special provision TP1

(8) Packing Authorizations (§173.***)

(8A) Exceptions	150	see 49 CFR §173.150
(8B) Non-bulk	202	see 49 CFR §173.202
(8C) Bulk	242	see 49 CFR §173.242

(9) Quantity Limits

(9A) Passenger aircraft/rail	5 L
(9B) Cargo aircraft only	60 L

(10) Vessel stowage

(10A) Location

Stowage category “E” means the material may be stowed “on deck” or “under deck” 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 is prohibited from carriage 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

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
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

	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.

Similar substances

UN / ID	Proper shipping name	Hazard class
	Diisopropylbenzene hydroperoxide, with more than 72 percent in solution	Forbidden
	Isopropylcumyl hydroperoxide, with more than 72 percent in solution	Forbidden
UN 1219	Isopropanol or Isopropyl alcohol	3
UN 1793	Isopropyl acid phosphate	8
UN 2490	Dichloroisopropyl ether	6.1
UN 2934	Isopropyl 2-chloropropionate	3
UN 1220	Isopropyl acetate	3
UN 2405	Isopropyl butyrate	3
UN 2947	Isopropyl chloroacetate	3
UN 2407	Isopropyl chloroformate	6.1
UN 2406	Isopropyl isobutyrate	3
UN 2483	Isopropyl isocyanate	6.1
UN 1222	Isopropyl nitrate	3
UN 2409	Isopropyl propionate	3
UN 2616	Triisopropyl borate	3