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547 UN No. 2210 maneb or UN No. 2210 maneb preparations in self-heating form are

substances of Class 4.2.

548 Chlorosilanes which, in contact with water, emit flammable gases, are substances of

Class 4.3.

549 Chlorosilanes having a flash-point of less than 23 °C and which, in contact with water,

do not emit flammable gases are substances of Class 3. Chlorosilanes having a

flash-point equal to or greater than 23 °C and which, in contact with water, do not emit

flammable gases are substances of Class 8.

550 UN No. 1333 cerium in slabs, rods or ingots is a substance of Class 4.1.

551 Solutions of these isocyanates having a flash-point below 23 °C are substances of

Class 3.

552 Metals and metal alloys in powdered or other flammable form, liable to spontaneous

combustion, are substances of Class 4.2. Metals and metal alloys in powdered or other

flammable form which, in contact with water, emit flammable gases are substances of

Class 4.3.

553 This mixture of hydrogen peroxide and peroxyacetic acid shall, in laboratory testing

(see Manual of Tests and Criteria, Part II, section 20), neither detonate in the cavitated

state nor deflagrate at all and shall show no effect when heated under confinement nor

any explosive power. The formulation shall be thermally stable (self-accelerating

decomposition temperature 60 °C or higher for a 50 kg package), and a liquid

compatible with peroxyacetic acid shall be used for desensitization. Formulations not

meeting these criteria are to be regarded as substances of Class 5.2 (see Manual of

Tests and Criteria, Part II, paragraph 20.4.3 (g)).

554 Metal hydrides which, in contact with water, emit flammable gases are substances of

Class 4.3. UN No. 2870 aluminium borohydride or UN No. 2870 aluminium

borohydride in devices is a substance of Class 4.2.

555 Dust and powder of metals in non-spontaneously combustible form, non-toxic which

nevertheless, in contact with water, emit flammable gases, are substances of Class 4.3.

556 Organometallic compounds and their solutions which ignite spontaneously are

substances of Class 4.2. Flammable solutions with organometallic compounds in

concentrations which, in contact with water, neither emit flammable gases in

dangerous quantities nor ignite spontaneously are substances of Class 3.

557 Dust and powder of metals in pyrophoric form are substances of Class 4.2.

558 Metals and metal alloys in pyrophoric form are substances of Class 4.2. Metals and

metal alloys which, in contact with water, do not emit flammable gases and are not

pyrophoric or self-heating, but which are easily ignited, are substances of Class 4.1.

559 Mixtures of a hypochlorite with an ammonium salt are not to be accepted for carriage.

UN No. 1791 hypochlorite solution is a substance of Class 8.

560 UN No. 3257 elevated temperature liquid, n.o.s., at or above 100 °C and, for a

substance with a flash-point, below its flash-point (including molten metals and

molten salts) is a substance of Class 9.

561 Chloroformates having predominantly corrosive properties are substances of Class 8.