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Hydroxylammonium Chloride

Hydroxylammonium chloride is the hydrochloric acid salt of hydroxylamine. It is a biological intermediate in the nitrification and in the anammox which are important in the nitrogen cycle in soil and in wastewater treatment. It is used in organic synthesis for preparation of oximes and hydroxamic acids from carboxylic acids, N- and O- substituted hydroxyamines, and addition reactions of carbon-carbon double bond. In surface treatments, it is used in the preparation of anti-skinning agents, corrosion inhibitors, and cleaner additives. It is also a starting material for pharmaceuticals and agrochemicals manufacturing. In the rubber and plastics industries, it is an antioxidant, vulcanization accelerator, and radical scavenger. It is also used as a fixative for textile dyes, auxiliary in some dyeing processes, as a metal extraction and flotation aid, as an antioxidant in fatty acids and soaps, and as a color stabilizer and emulsion additive in color films.

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Hydroxypethidine

Hydroxypethidine is an opioid analgesic that is an analogue of pethidine. It is significantly less potent than meperidine as an analgesic, although it also has NMDA antagonist properties like its close relative ketobemidone. It has similar effects to other opioids, and produces analgesia, sedation and euphoria. Side effects can include itching, nausea and potentially serious respiratory depression which can be life-threatening.

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Hydroxyprogesterone Acetate

Hydroxyprogesterone Acetate is used as pharma intermediate.

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Hydroxypropyl Methylcellulose

Hydroxypropyl methylcellulose is a semisynthetic, inert, viscoelastic polymer used as an ophthalmic lubricant, as well as an excipient and controlled-delivery component in oral medicaments, found in a variety of commercial products. As a food additive, hydroxypropyl methylcellulose is an emulsifier, thickening and suspending agent, and an alternative to animal gelatin. It is used primarily in construction materials like tile adhesives and renders where it is used as a rheology modifier and water retention agent. Hydroxypropyl methylcellulose solutions were patented as a semisynthetic substitute for tear-film. In addition to its use in ophthalmic liquids, hydroxypropyl methylcellulose has been used as an excipient in oral tablet and capsule formulations, where, depending on the grade, it functions as controlled release agent to delay the release of a medicinal compound into the digestive tract. It is also used as a binder and as a component of tablet coatings. Other applications include paints, cosmetics and detergents.

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Hydroxypropyl Methylcellulose Phthalate

Hydroxypropyl Methylcellulose Phthalate is an enteric coating agent is used to protect drugs from degradation by gastric acid or to prevent them from causing side effects in the stomach. It was developed and used originally as an enteric coating agent, its favorable properties have led to extension of its range of applications into other fields, including sustained release preparations, binders and microcapsule bases, in the above-mentioned applications. Hydroxypropyl Methylcellulose Phthalate is usually used alone, but can be used in combination with other polymers, as in the case of the sustained release preparations.

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Hydroxyurea 99%

Name

Hydroxyurea

Synonyms

Hydroxycarbamide

Molecular Formula

CH4N2O2

Molecular Weight

76.05

CAS Registry Number

127-07-1

EINECS

204-821-7

Melting point

142-146

Water solubility

soluble

Off-White Crystalline Solid

An anti-neoplastic - inhibits ribonucleoside reductase and DNA replication. A potential therapy for sickle cell anemia which involves the nitrosylation of sickle cell hemoglobin. Horseradish peroxidase catalyzes nitric oxide formation from hydroxyurea in the presence of hydrogen peroxide.

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Hydroxyzine

Hydroxyzine is a histamine H1 receptor antagonist that is effective in the treatment of chronic urticaria, dermatitis, and histamine-mediated pruritus. Symptoms of overexposure include hypersedation.

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Hymecromone

Hymecromone is a drug used in bile therapy. It is used as choleretic and antispasmodic drugs and as a standard for the fluorometric determination of enzyme activity.

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Hypericin

Hypericin is a naphtodianthrone, a red-coloured anthraquinone-derivative, which, together with hyperforin, is one of the principal active constituents of Hypericum. It is believed to act as an antibiotic and non-specific kinase inhibitor. It may inhibit the action of the enzyme dopamine β-hydroxylase, leading to increased dopamine levels, although thus possibly decreasing norepinephrine and epinephrine. It derives from polyketides cyclisation.

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Hypophosphorous Acid

Hypophosphorous acid is a phosphorus oxoacid and a powerful reducing agent. It is used in the formulation of pharmaceuticals, discoloration of polymers, water treatment, retrieval of precious or non-ferrous metals. Its main use is for electroless plating; i.e. deposition of select metal films from solution on a sensitized surface.

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