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A monograph for the pharmaceutical substance "OXYGENIUM/ OXYGEN" from the fourth edition of "The International Pharmacopoeia" is presented. Oxygen is categorized as a gas for inhalation and described as a colorless and odorless gas. A volume of oxygen dissolves in about 32 volumes of water and in about 7 volumes of ethanol TS, both at a pressure of 103.3 kPa. It is recommended that this substance be kept in a compresses gas or liquid at cryogenic temperature. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NITROFURANTOINUM/NITROFURANTOIN" from the fourth edition of "The International Pharmacopoeia" is presented. Nitrofurantoin is categorized as an antibacterial drug and described as lemon yellow crystals or a yellow, odourless or almost odourles crystalline powder, that is practically insoluble in water and very slightly soluble in ethanol. It is recommended that this substance be kept in a well-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NIFEDIPINUM/NIFEDIPINE" from the fourth edition of "The International Pharmacopoeia" is presented. Nifedipine is categorized as a cardiovascular drug and described as a yellow, crystalline powder, that is practically insoluble in water and freely soluble in acetone R. It is recommended that this substance be kept in a tightly closed container, protected from light. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NEVIRAPINUM/NEVIRAPINE" from the fourth edition of "The International Pharmacopoeia" is presented. Nevirapine is categorized as an antiretroviral and described as a white to almost white powder, that is practically insoluble in water. It is recommended that this substance be kept in a well-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NEOSTIGMINI METILSULFAS/NEOSTIGMINE METILSULFATE" from the fourth edition of "The International Pharmacopoeia" is presented. Neostigmine metilsulfate is categorized as cholinergic and described as a white, odorless crystalline powder, that is very soluble in water. It is recommended that this substance be kept in a tighly closed container and protected from light. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "OXYTETRACYCLINI HYDROCHLORIDUM/OXYTETRACYCLINE HYDROCHLORIDE" from the fourth edition of "The International Pharmacopoeia" is presented. Oxytetracycline hydrochloride is categorized as an antibacterial drug and described as a yellow, crystalline and odorless powder, that is very slightly soluble in water. It is recommended that this substance be kept in a tightly closed container and protected from light. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "OXYTETRACYCLINI DIHYDRAS/OXYTETRACYCLINE DIHYDRATE" from the fourth edition of "The International Pharmacopoeia" is presented. Oxytetracycline dihydrate is categorized as an antibacterial drug and described as a pale yellow, odorless, crystalline powder, that is very slightly soluble in water and sparingly soluble in ethanol T. It is recommended that this substance be kept in a tightly-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "OXAMNIQUINUM/OXAMNIQUINE" from the fourth edition of "The International Pharmacopoeia" is presented. Oxamniquine is categorized as antischistosomal and described as a yellow-orange, crystalline powder, that is sparingly soluble in water and soluble in methanol R and acetone R. It is recommended that this substance be kept in a well-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NYSTATINUM/NYSTATIN" from the fourth edition of "The International Pharmacopoeia" is presented. Nystatin is categorized as an antifungal drug and described as a yellow to light brown powder, that is very sightly soluble in water and sparingly soluble in ethanol TS and methanol R. It is recommended that this substance be kept in a tightly-closed container and protected from light. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NICOTINAMIDUM/NICOTINAMIDE" from the fourth edition of "The International Pharmacopoeia" is presented. Nicotinamide is categorized as a vitamin and described as a colorless, odorless and crystalline powder, that is very soluble in 1 part of water and 2 parts of ethanol. It is recommended that this substance be kept in a well-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NITRAZEPAMUM/NITRAZEPAM" from the fourth edition of "The International Pharmacopoeia" is presented. Nitrazepam is categorized as a sedative and a hypnotic agent and described as a yellow, odourless or almost odourless crystalline powder, that is practically insoluble in water and slightly soluble in ethanol. It is recommended that this substance be kept in a well-closed container and protected from light. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NOSCAPINI HYDROCHLORIDUM/NOSCAPINE HYDROCHLORIDE" from the fourth edition of "The International Pharmacopoeia" is presented. Noscapine hydrochloride is categorized as an antitussive drug and described as colourless crystals or a white, odorless crystalline powder, that is freely soluble in water and ethanol TS. It is recommended that this substance be kept in a well-closed container and protected from light. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NORETHISTERONI ACETAS/NORETHISTERONE ACETATE" from the fourth edition of "The International Pharmacopoeia" is presented. Norethisterone acetate is categorized as a progestational steroid and described as a white or creamy white, crystalline powder, that is insoluble in water and soluble in 12.5 parts of ethanol TS and in 4 parts of acetone R. It is recommended that this substance be kept in a well-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NOSCAPINUM/NOSCAPINE" from the fourth edition of "The International Pharmacopoeia" is presented. Noscapine is categorized as an antitussive drug and described as colourless crystals or a white, codorless or almost odorless crystalline powder, that is practically insoluble in water and sparingly soluble in boiling water. It is recommended that this substance be kept in a well-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NIRIDAZOLUM/NIRIDAZOLE" from the fourth edition of "The International Pharmacopoeia" is presented. Niridazole is categorized as an antischistosomal drug and described as a yellow, odourless or almost odourless crystalline powder, that is practically insoluble in water and ether R and soluble in dimethylformamide R. It is recommended that this substance be kept in a tighly-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NORETHISTERONUM/NORETHISTERONE" from the fourth edition of "The International Pharmacopoeia" is presented. Norethisterone is categorized as a progestational steroid and described as a white or creamy white, odorless crystalline powder. It is recommended that this substance be kept in a well-closed container and protected from light. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NORETHISTERONI ENANTAS/NORETHISTERONE ENANTATE" from the fourth edition of "The International Pharmacopoeia" is presented. Norethisterone enantate is categorized as a contraceptive and described as a white to creamy white, odorless crystalline powder, that is insoluble in water and freely soluble in preparations like acetone R or methanol R. It is recommended that this substance be kept in a well-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NIFURTIMOXUM/NIFURTIMOX" from the fourth edition of "The International Pharmacopoeia" is presented. Nifurtimox is categorized as an antitrypanosomal drug and described as yellow to orange-yellow, odorless, crystalline powder, that is practically insoluble in water and ether R. It is recommended that this substance be kept in a well-closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NICLOSAMIDUM/NICLOSAMIDE" from the fourth edition of "The International Pharmacopoeia" is presented. Niclosamide is categorized as a taeniacide and described as a cream-coloured odorless crystalline powder, that is practically insoluble in water. It is recommended that this substance be kept in a tighly closed container. Procedures for performing an identity test and assay of the substance are described.

A monograph for the pharmaceutical substance "NEOSTIGMINI BROMIDUM/NEOSTIGMINE BROMIDE" from the fourth edition of "The International Pharmacopoeia" is presented. Neostigmine bromide is categorized as cholinergic and described as a colorless crystal ir a white, odorless crystalline powder, that is very soluble in water. It is recommended that this substance be kept in a tightly closed container and protected from light. Procedures for performing an identity test and assay of the substance are described.