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Federal Register / Vol. 86, No. 151 / Tuesday, August 10, 2021 / Proposed Rules
iv A total quantity of not more than the aggregate of that permitted in paragraphs c2i through iii of this section, for each category of material in the package, when a package contains hazardous materials in two or more of the categories in paragraphs c2i through iii of this section; and d Except for transportation by aircraft, when a package contains hazardous materials in two or more of the categories listed in paragraph c1

b. Adding in paragraph e, in the Organic Peroxide IBC Table, entries for tert-Amyl peroxypivalate, not more than 42% as a stable dispersion in water and tert-Butyl peroxypivalate, not more than 42% in a diluent type A
in alphabetical order.
The revisions read as follows:

of this section the total quantity required by 172.202c of this subchapter to be entered on the shipping paper must be either the aggregate quantity, or the estimated quantity, of all hazardous materials, expressed as net mass.
31. In 173.225:
a. Revising in paragraph c, in the Organic Peroxide Table, the entry Di4-tert-butylcyclohexyl peroxydicarbonate as a paste; and

173.225 Packaging requirements and other provisions for organic peroxides.

c

TABLE TO PARAGRAPH c: ORGANIC PEROXIDE TABLE
Technical name
ID No.

1

B

I

Water mass %

Packing method
Control
Emergency
3

4a
4b
4c
5

6

7a
7b

Di-4-tertUN3118
butylcyclohexylperoxydicarbonate as a paste.

42

Temperature C

A

2

Diluent mass %

Concentration mass %

Notes

OP8

8

35

40

e

TABLE TO PARAGRAPH e: ORGANIC PEROXIDE IBC TABLE
UN No.

Organic peroxide
Type of IBC

Maximum quantity liters
Control temperature
Emergency temperature

3119

ORGANIC PEROXIDE, TYPE F, LIQUID, TEMPERATURE CONTROLLED.

tert-Amyl peroxypivalate, not more than 42% as a stable dispersion in water.
tert-Butyl peroxypivalate, not more than 42% in a diluent type A

31HA1

1000

0 C

31HA1
31A

1000
1250

10 C
10 C

32. In 173.301b, revise paragraphs a2 and c to read as follows:

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173.301b Additional general requirements for shipment of UN pressure receptacles.

a
2 The gases or gas mixtures must be compatible with the UN pressure receptacle and valve materials as prescribed for metallic materials in ISO
111141:2012E and ISO 11114
1:2012/Amd 1:2017E IBR, see 171.7
of this subchapter and for non-metallic materials in ISO 111142:2013E IBR, see 171.7 of this subchapter.

c Pressure receptacle valve requirements. 1 When the use of a valve is prescribed, the valve must
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conform to the requirements in ISO
10297:2014E, and ISO 10297:2014/
Amd 1:2017 see 171.7 of this subchapter. Quick release cylinder valves for specification and type testing must conform to the requirements in ISO 17871:2015E IBR, see 171.7 of this subchapter. Until December 31, 2020, the manufacture of a valve conforming to the requirements in ISO
10297:2006E IBR, see 171.7 of this subchapter was authorized. Until December 31, 2008, the manufacture of a valve conforming to the requirements in ISO 10297:1999E IBR, see 171.7
of this subchapter was authorized.
2 A UN pressure receptacle must have its valves protected from damage that could cause inadvertent release of the contents of the UN pressure
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+10 C
15C
15C

receptacle by one of the following methods:
i By constructing the pressure receptacle so that the valves are recessed inside the neck of the UN
pressure receptacle and protected by a threaded plug or cap;
ii By equipping the UN pressure receptacle with a valve cap conforming to the requirements in ISO
11117:2008E and Technical Corrigendum 1 IBR, see 171.7 of this subchapter. Until December 31, 2014, the manufacture of a valve cap conforming to the requirements in ISO
11117:1998E IBR, see 171.7 of this subchapter was authorized. The cap must have vent-holes of sufficient crosssectional area to evacuate the gas if leakage occurs at the valve;

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