1971-HKRS30-16-30_Part07 — Page 12

1701.

36

GROUP L

CHEMICALS, METALLOIDS AND PETROLEUM PRODUCTS.

Lead azide, sodium azide and primary explosives or priming compositions (mixtures) containing either azides or szidę com- pounds or complexes or both (for example, ortho-fluorophenyl azide, silver chlorazide, cuprammonium azide).

4701.

1703.

1715.

Lead dinitroresorcinate, barium styphnate, mercury fulminate, lead styphoate, lead thiocyanale, letrazche and diazodinitro- phenol; primary explosives or priming compositions (mixtures) containing one or more of these chemicals,

Hydraulic fluids which are or which contain as the principal ingredients petroleum (mineral) cíla and which have all of the following characteristics———

(a) A pour point of ·30° F. (-14° C) or lower;

(5) A viscosity index of 75 or greater; and

(c) Are thermally stable at

Boron, as follows-

+700° F. (+371° C)

(a) Boron element, boron compounds and mixtures in which the boron-10 isotope comprises more than 20% of the total boron conlent;

(8) Beron element (metal) all forms;

(c) Boron compounds and mixtures (except pharmaceutical

specialities packaged for retail sale), as follows-

0) Boron trifluoride and its complexes;

1755.

1757.

1760.

(1) Boron carbide having a boron content of 74% Or more by weight, boroo bydrides and boron nitrides;

(iii) Alloys, compounds and mixtures containing 1% or more of boron, free or combined.

1762.

4715.

Boron trichloride and its complexes.

1763.

1721.

Diethylene Triamine of a purity of 96% or higher,

1746.

Polymeric substances and manufactures thereof, as follows- (a) Polyimider:

17.54.

(b) Polybenzimidazoles;

(c) Polyimidazopyrrolones;

(d) Aromatic polyamides;

(e) Polyparaxylylenes,

Fluoro carbon compounds and manufactures, as follows come

(a) Monomers, homopolymers and co-polymers as follows-

(1) Polytetrafluoroethylene;

(ii) Olly and waxy modifications of polychlorotri- fluoroethylcos;

(iii) Polyvinylidene@uoride;

(iv) Co-polymer of tetrafluoroethylene and hexafluoro- propylene;

1770.

37

(v) Co‐polymer of tetrafluoroethylene and chlorotri- fluoroethylene,

(vi) Co-polymer of chlorotrifluoroethylene and vinyli- dencfluoride;

(vi) Co-polymer of hexafluomopropylene and vinylidene- fluoride:

(viii) Polybromotrifluoroethylene:

([x) Co-polymer of brometrifluoroethylene and chloro- trifluoroethylene;

(x) Dibromotetrafluoroethane;

(8) Manufactures made wholly of the materials in (a) above;

(e) Electric wire and cable coated with or insulated with any

of the materials in (6) above.

Silicons fluids and greasts, as follows--

(a) Fluorinated silicone Quids and chlorinated silicone fluids; (b) Silicone lubricating greases capable of operating at tem- peratures of 356°F. (180°C.) or higher and having a drop paint (method of test being ASTM or ITP) of 428*F. (220°C) or higher,

Compounds and metallic materials, as follows-

(2) Silicon of a purity of 99,99% or more, and all monocry-

stalline silicon:

(6) Monocrystalline gallium compounds in any form; (c) Monocrystalline indium compounds in any form.

Compounds of tantalum, niobium (columbium) and tantalum- niobium, excluding compounds containing less than 20% of lantalum or niobium.

Aluminium bydride.

Fibrous and filamentary materials which may be used in composite structures or laminates and manufactures thereof, as follows-

(a) Having both of the following characteristics—-

* 104;

(i) Specific modulus greater than 123 x 108; (ii) Specific tensile strength greater than (8) Having both of the following characteristics-

6) Specific modulus greater than 1 X 10%; (ü) Melting or sublimation point higher than 3,000*F. (1,649°C.) in an inert environment; except carbon fibres having a specific modulus of less than 2 x 10* and a specific tensile strength of less than 1 x 105;

(2) Composite structures and laminates fabricated, by using equipment covered by item 1357, Group D, from materials covered by sub-items (2) and (b).

Any liquid fuel, including petroleum products, having a gross caloriffic value of not less than 13,000 calories/grammes (23,400 B.Th.U/15) which contains high energy components or com pounds.