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The compounds of the formula ##STR1## in which R is amino, cyclic amino, aryloxy or a group of the formula ##STR2## in which L is a radical of the formula .dbd.N-Z, with Z being alkyl or cycloalkyl, or is a heterocyclic radical, aryleneoxy or oxyaryleneoxy and R' and R" are hydrogen, alkyl or halogen, and x and y are 0, 1, 2 or 3, are suitable development accelerators for the development of exposed photographic materials containing silver halide. They accelerate the reduction of the exposed silver salt to silver and thus enhance the sensitivity of the photographic material.

The invention relates to a photographic recording material comprising, on a base, at least one silver-halide emulsion layer and, if desired, at least one interlayer and/or a protection layer, where at least one of said layers contains a UV absorber of the 2-hydroxyphenyltriazine type, as described in greater detail in claim 1; this UV absorber can also be in the form of a homopolymer or copolymer.

A color-photographic recording material is described which contains a magenta coupler and, as stabilizer, at least one compound of the formula ##STR1## where the radicals are as defined in the specification.

Compounds of the formula I ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have the meaning given in claim 1 are formed by thermal rearrangement of the isomers of formula V ##STR2## especially in the presence of basic catalysts. The compounds are corrosion inhibitors for organic materials, in particular coating materials and lubricants. In these substrates they also act as antioxidants and light-stabilizers and are very stable to heat.

Compounds of the formula I ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, and R.sup.5 have the meaning given in claim 1 are formed by thermal rearrangement of the isomers of formula V ##STR2## especially in the presence of basic catalysts. The compounds are corrosion inhibitors for organic materials, in particular coating materials and lubricants. In these substrates they also act as antioxidants and light-stabilizers and are very stable to heat.

A photographic material is described which comprises, on a base, blue-sensitive, green-sensitive and/or red-sensitive silver-halide emulsion layers and, if desired, a protection layer, a layer containing a UV absorber being arranged between the uppermost silver-halide emulsion layer and the protection layer, or on top of the uppermost silver-halide emulsion layer, wherein the UV absorber conforms to the formula ##STR1## in which the radicals E.sub.1, E.sub.2 and E.sub.3 are independently alkyl, substituted alkyl, alkenyl, glycidyl, cycloalkyl, phenylalkyl or siloxyl.

A photographic material is described which comprises, on a base, blue-sensitive, green-sensitive and/or red-sensitive silver-halide emulsion layers and if desired a protection layer, a layer containing a UV absorber being arranged between the uppermost silver-halide emulsion layer and the protection layer or on top of the uppermost silver-halide emulsion layer, wherein the UV absorber conforms to the formula ##STR1## in which the radical R.sub.1 is alkyl, substituted alkyl, alkenyl, glycidyl, cycloalkyl or phenylalkyl, and R.sub.12 is alkyl, benzyl, cyclohexyl, phenyl, substituted phenyl or alkoxy.

A UV absorber of formula (1a) ##STR1## in which E.sub.1, E.sub.2 and E.sub.3 are independently substituted alkyl or substituted silyl or siloxyl moieties, are useful in protecting photographic materials from the deleterious effects of actinic light.

A color-photographic recording material is described which contains a magenta coupler and, as stabilizer, at least one compound of the formula ##STR1## where the radicals are as defined in claim 1.

A photographic material is described which comprises, on a base, blue-sensitive, green-sensitive and/or red-sensitive silver-halide emulsion layers and if desired a protection layer, a layer containing a UV absorber being arranged between the uppermost silver-halide emulsion layer and the protection layer or on top of the uppermost silver-halide emulsion layer, wherein the UV absorber conforms to the formula ##STR1## in which the radicals R.sub.1 and R.sub.12 are as defined in claim 1.