A process for producing particles, the process including pulverizing particles of a compound represented by formula (I) with a median diameter (50% D) of over 100 μm by using a pulverizer in the presence of at least one member selected from the group consisting of silica, talc and clay, to obtain particles of the compound represented by formula (I) with a median diameter (50% D) of 100 μm or less, ##STR00001##
in formula (I), R.sup.1 and R.sup.2 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, or alternatively, R.sup.1 and R.sup.2 are inked to each other to form a ring together with the nitrogen atom to which they are bound, m represents an integer of 2 to 9, M.sup.n+ represents H.sup.+ or an n-valent metal ion, and n represents an integer of 1 or 2.

A process for producing particles, the process including pulverizing particles of a compound represented by formula (I) with a median diameter (50% D) of over 100 μm by using a pulverizer in the presence of at least one member selected from the group consisting of silica, talc and clay, to obtain particles of the compound represented by formula (I) with a median diameter (50% D) of 100 μm or less, ##STR00001##
in formula (I), R.sup.1 and R.sup.2 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, or alternatively, R.sup.1 and R.sup.2 are inked to each other to form a ring together with the nitrogen atom to which they are bound, m represents an integer of 2 to 9, M.sup.n+ represents H.sup.+ or an n-valent metal ion, and n represents an integer of 1 or 2.

Methods of synthesizing and purifying certain 3,7-diamino-phenothiazin-5-ium compounds (referred to herein as “diaminophenothiazinium compounds”) including Methythioninium Chloride (MTC) (also known as Methylene Blue) are provided. ##STR00001##

Methods of synthesizing and purifying certain 3,7-diamino-phenothiazin-5-ium compounds (referred to herein as “diaminophenothiazinium compounds”) including Methythioninium Chloride (MTC) (also known as Methylene Blue) are provided. ##STR00001##

Oxidized disulfide oil (ODSO) solvent compositions are derived from by-product disulfide oil (DSO) compounds produced as by-products from the generalized mercaptan oxidation (MEROX) processing of a refinery feedstock. The oxidized disulfide oil (ODSO) solvent compositions comprise at least a primary oxidized disulfide oil (ODSO) compound selected from either water soluble or water insoluble oxidized disulfide oil (ODSO) compounds and in some embodiments at least 0.1 ppmw of a secondary oxidized disulfide oil (ODSO) compound that is a water soluble oxidized disulfide oil (ODSO) compound.

Oxidized disulfide oil (ODSO) solvent compositions are derived from by-product disulfide oil (DSO) compounds produced as by-products from the generalized mercaptan oxidation (MEROX) processing of a refinery feedstock. The oxidized disulfide oil (ODSO) solvent compositions comprise at least a primary oxidized disulfide oil (ODSO) compound selected from either water soluble or water insoluble oxidized disulfide oil (ODSO) compounds and in some embodiments at least 0.1 ppmw of a secondary oxidized disulfide oil (ODSO) compound that is a water soluble oxidized disulfide oil (ODSO) compound.

Oxidized disulfide oil (ODSO) solvent compositions are derived from by-product disulfide oil (DSO) compounds produced as by-products from the generalized mercaptan oxidation (MEROX) processing of a refinery feedstock. The oxidized disulfide oil (ODSO) solvent compositions comprise at least a primary oxidized disulfide oil (ODSO) compound selected from either water soluble or water insoluble oxidized disulfide oil (ODSO) compounds and in some embodiments at least 0.1 ppmw of a secondary oxidized disulfide oil (ODSO) compound that is a water soluble oxidized disulfide oil (ODSO) compound.

Oxidized disulfide oil (ODSO) solvent compositions are derived from by-product disulfide oil (DSO) compounds produced as by-products from the generalized mercaptan oxidation (MEROX) processing of a refinery feedstock. The oxidized disulfide oil (ODSO) solvent compositions comprise at least a primary oxidized disulfide oil (ODSO) compound selected from either water soluble or water insoluble oxidized disulfide oil (ODSO) compounds and in some embodiments at least 0.1 ppmw of a secondary oxidized disulfide oil (ODSO) compound that is a water soluble oxidized disulfide oil (ODSO) compound.

A resist composition that contains a base material component exhibiting changed solubility in a developing solution under action of acid and a compound (D0) represented by General Formula (d0), in which R.sup.01, R.sup.02, R.sup.03, and R.sup.04 each independently represents a hydrogen atom, a hydroxy group, a halogen atom, or an alkyl group; alternatively, R.sup.01 and R.sup.02, R.sup.02 and R.sup.03, or R.sup.03 and R.sup.04 are bonded to each other to form an aromatic ring; R.sup.05 represents a hydrogen atom or an alkyl group; Y represents a group that forms an alicyclic group together with a carbon atom *C; provided that at least one of the carbon atoms that form the alicyclic group is substituted with an ether bond, a thioether bond, a carbonyl group, a sulfinyl group, or a sulfonyl group; m represents an integer of 1 or more, and M.sup.m+ represents an m-valent organic cation. ##STR00001##

Methods of synthesizing and purifying certain 3,7-diamino-phenothiazin-5-ium compounds (referred to herein as diaminophenothiazinium compounds) including Methythioninium Chloride (MTC) (also known as Methylene Blue) are provided.

##STR00001##