Dibromodifluoromethane, R12B2

Dibromodifluoromethane is a mixed halomethane. It is a colorless non-flammable liquid. Along with Halons 1211, 2402, and 1301, it is one of the most effective fire extinguishers, however, it is also very toxic. It is a class I ozone depleting substance (ODS). Wikipedia

Substance Data

Source: TOXNET

CAS-Number

75-61-6

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 171

Data from the Hazardous Materials Table

Source: 49 CFR §172 (2018/07)

(3) Hazard Class

9
Miscellaneous hazardous materials

(4) Identification number

UN 1941

(5) Packing Group

III

(6) Labels

None

(1) Symbols

This entry is signed with "A". The letter "A" denotes a material that is subject to the requirements of this subchapter only when offered or intended for transportation by aircraft, unless the material is a hazardous substance or a hazardous waste. A shipping description entry preceded by an "A" may be used to describe a material for other modes of transportation provided all applicable requirements for the entry are met.

(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.

T11	see 49 CFR §172.102
TP2	a. The maximum degree of filling must not exceed the degree of filling determined by the following: 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: 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

(8) Packing Authorizations (§173.***)

(8A) Exceptions	155	see 49 CFR §173.155
(8B) Non-bulk	203	see 49 CFR §173.203
(8C) Bulk	241	see 49 CFR §173.241

(9) Quantity Limits

(9A) Passenger aircraft/rail	100 L
(9B) Cargo aircraft only	220 L

(10) Vessel stowage

(10A) Location

Stowage category “A” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel.

Source: 49 CFR §172.101(k)

(10B) Other

25	Protected from sources of heat

Source: 49 CFR §176.84

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.

No compatibility information for class 9 in 49 CFR §177.848 included.

There are no restrictions with hazardous materials, as pointed out in the instructions for using the Segregation Table (see 49 CFR §177.848(e)). But please, refer to following requirements in 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.

Substances with similar name

UN-Number	Name	Hazard Class
UN 1009	Bromotrifluoromethane or Refrigerant gas, R 13B1.	2.2
UN 1973	Chlorodifluoromethane and chloropentafluoroethane mixture or Refrigerant gas R 502 with fixed boiling point, with approximately 49 percent chlorodifluoromethane	2.2
UN 1018	Chlorodifluoromethane or Refrigerant gas R 22	2.2
UN 1022	Chlorotrifluoromethane or Refrigerant gas R 13	2.2
UN 1941	Dibromodifluoromethane, R12B2	9
UN 2602	Dichlorodifluoromethane and difluoroethane azeotropic mixture or Refrigerant gas R 500 with approximately 74 percent dichlorodifluoromethane	2.2
UN 1028	Dichlorodifluoromethane or Refrigerant gas R 12	2.2
UN 1029	Dichlorofluoromethane or Refrigerant gas R21	2.2
UN 3252	Difluoromethane or Refrigerant gas R 32	2.1
UN 3070	Ethylene oxide and dichlorodifluoromethane mixture, with not more than 12.5 percent ethylene oxide	2.2
	R 14, see Tetrafluoromethane
	R 21, see Dichlorofluoromethane
	R 500, see Dichlorodifluoromethane and difluorethane, etc
UN 1982	Tetrafluoromethane or Refrigerant gas R 14	2.2
UN 3136	Trifluoromethane, refrigerated liquid	2.2
UN 1984	Trifluoromethane or Refrigerant gas R 23	2.2