Abstract: The purpose of the present invention is to provide a novel cosmetic composition or cosmetic quasi-drug which has excellent storage stability. The cosmetic composition or cosmetic quasi-drug comprising: lipid particles containing at least a phospholipid; a polyhydric alcohol; and water, wherein a content of a trihydric or higher alcohol in the polyhydric alcohol is 0 to 20% by mass relative to 100% by mass of the polyhydric alcohol.

Abstract: High purity cyclohexasilane and a method for increasing the purification efficiency thereto are provided. The method for producing cyclohexasilane of the present invention is characterized in that, in distilling crude cyclohexasilane to obtain purified cyclohexasilane, the absolute pressure during distillation is set to 2 kPa or less, and the heating temperature of crude cyclohexasilane is set to 25 to 100° C. The cyclohexasilane of the present invention contains pure cyclohexasilane at a rate of 98% by mass or more and 100% by mass or less.

Abstract: A neutral complex of a cyclic silane characterized in being represented by the general formula [Y]1[SimZ2m-aHa]. (In the formula: Y is at least one kind of coordination compound selected from a group consisting of (1) compounds represented as X1R1n. (when X1 is P, P?O or N, n=3 and each R1 represents a substituted or unsubstituted alkyl group or aryl group and R1s are the same or different; when X1 is S, S?O or O, n=2 and each R1 represents the same group as described above and R1s are the same or different; and the number of amino groups in X1R1n is 0 or 1), and (2) at least one heterocyclic compound selected from the group consisting of substituted or unsubstituted N—, O—, S —or P— containing heterocyclic compounds that have an unshared electron pair in the ring (the number of amino groups in the heterocyclic compound is 0 or 1), each Z represents a halogen atom of any of Cl, Br, I and F and Zs are the same or different, l is 1 or 2, m is 3 to 8, and a is 0 to m.

Abstract: High purity cyclohexasilane and a method for increasing the purification efficiency thereto are provided. The method for producing cyclohexasilane of the present invention is characterized in that, in distilling crude cyclohexasilane to obtain purified cyclohexasilane, the absolute pressure during distillation is set to 2 kPa or less, and the heating temperature of crude cyclohexasilane is set to 25 to 100° C. The cyclohexasilane of the present invention contains pure cyclohexasilane at a rate of 98% by mass or more and 100% by mass or less.

Abstract: High purity cyclohexasilane and a method for increasing the purification efficiency thereto are provided. The method for producing cyclohexasilane of the present invention is characterized in that, in distilling crude cyclohexasilane to obtain purified cyclohexasilane, the absolute pressure during distillation is set to 2 kPa or less, and the heating temperature of crude cyclohexasilane is set to 25 to 100° C. The cyclohexasilane of the present invention contains pure cyclohexasilane at a rate of 98% by mass or more and 100% by mass or less.

Abstract: A neutral complex of a cyclic silane characterized in being represented by the general formula [Y]1[SimZ2m-aHa]. (In the formula: Y is at least one kind of coordination compound selected from a group consisting of (1) compounds represented as X1R1n. (when X1 is P, P?O or N, n=3 and each R1 represents a substituted or unsubstituted alkyl group or aryl group and R1s are the same or different; when X1 is S, S?O or O, n=2 and each R1 represents the same group as described above and R1s are the same or different; and the number of amino groups in X1R1n is 0 or 1), and (2) at least one heterocyclic compound selected from the group consisting of substituted or unsubstituted N-, O-, S- or P-containing heterocyclic compounds that have an unshared electron pair in the ring (the number of amino groups in the heterocyclic compound is 0 or 1), each Z represents a halogen atom of any of Cl, Br, I and F and Zs are the same or different, l is 1 or 2, m is 3 to 8, and a is 0 to m.

Abstract: An object of the present invention is to provide a production method that can efficiently produce a cyclic silane compound or a salt thereof with a high yield and to provide a novel salt having a cyclic silane dianion that is easy to handle and a cyclic silane dianion salt-containing composition. The method for producing a cyclic silane compound or a salt thereof of the present invention includes the step of allowing a halosilane compound to react in the presence of at least one of a phosphonium salt and an ammonium salt, and a compound represented by a specific formula.

Abstract: High purity cyclohexasilane and a method for increasing the purification efficiency thereto are provided. The method for producing cyclohexasilane of the present invention is characterized in that, in distilling crude cyclohexasilane to obtain purified cyclohexasilane, the absolute pressure during distillation is set to 2 kPa or less, and the heating temperature of crude cyclohexasilane is set to 25 to 100° C. The cyclohexasilane of the present invention contains pure cyclohexasilane at a rate of 98% by mass or more and 100% by mass or less.

Abstract: Provided is a method for efficiently obtaining cyclohexasilane using a cyclic silane dianion salt as a raw material without a by-product such as silane gas by a simple device. The method for producing cyclohexasilane has a feature that a cyclic silane dianion salt represented by the following general formula (i) or general formula (ii) is reacted with an aluminum-based reducing agent or a boron-based reducing agent: wherein X represents a halogen element, a represents an integer of 0 to 6, and R1 to R4 each independently represent a hydrogen atom, an alkyl group, or an aryl group; wherein X represents a halogen element, a represents an integer of 0 to 6, and R5 to R8 each independently represent a hydrogen atom, an alkyl group, or an aryl group.

Abstract: An object of the present invention is to provide a production method that can efficiently produce a cyclic silane compound or a salt thereof with a high yield and to provide a novel salt having a cyclic silane dianion that is easy to handle and a cyclic silane dianion salt-containing composition. The method for producing a cyclic silane compound or a salt thereof of the present invention includes the step of allowing a halosilane compound to react in the presence of at least one of a phosphonium salt and an ammonium salt, and a compound represented by a specific formula.