Ethylhydrocupreine Hydrochloride (optochin) is a reagent used in the alteration in bacterial morphology, it is now used in cell culture techniques for the presumptive identification of Streptococcus pneumoniae, which is optochin-sensitive, from other alpha-hemolytic streptococci such as viridans streptococci, which are resistant. However, a single standardized procedure does not exist. Optochin is included neither in the current EUCAST breakpoint tables nor in the CLSI performance standards for antimicrobial susceptibility testing.

p-Phenylenediamine is one of the simplest aromatic diamine primarily used as a component of engineering polymers, composites, dye intermediate and as a hair dye. p-Phenylenediamine is easily oxidized, and for this reason derivatives of p-Phenylenediamine are used as antiozonants in the production of rubber products. The substituents, naphthyl, isopropyl etc. affect the effectiveness of their antioxidant roles as well as their properties as skin irritants. Acute (short-term) exposure to high levels of p-phenylenediamine may cause severe dermatitis, eye irritation and asthma, gastritis, renal failure, vertigo, tremors, convulsions, and coma in humans. Eczematoid contact dermatitis may result from chronic (long-term) exposure in humans. In rats and mice chronically exposed to p-phenylenediamine in their diet, depressed body weights, but no other clinical signs of toxicity were observed in several studies. No information is available on the reproductive, developmental, or carcinogenic effects of p-phenylenediamine in humans. EPA has not classified p-phenylenediamine with respect to carcinogenicity.

Nickel (II) oxide is an olive gray powder, insoluble in water and soluble in acids. It is produced industrially and used mainly as an intermediate in the production of nickel alloys and as a hydrogenation catalyst. Long-term inhalation of NiO is damaging to the lungs, causing lesions and in some cases cancer.

Nickel (II) oxide is an olive gray powder, insoluble in water and soluble in acids. It is produced industrially and used mainly as an intermediate in the production of nickel alloys and as a hydrogenation catalyst. Long-term inhalation of NiO is damaging to the lungs, causing lesions and in some cases cancer.

Sodium dichromate is an inorganic compound, containing hexavalent chromium. It is highly corrosive and is a strong oxidizing agent. Sodium dichromate is mainly used to produce other chromium compounds but is also used in drilling muds, in metal treatments, in wood preservatives, in the production of dyes and organic chemicals and as a corrosion inhibitor. Sodium dichromate primarily affects the respiratory system causing ulcerations, shortness of breath, bronchitis, pneumonia, and asthma but can also affect the gastrointestinal tract, liver, kidneys and immune system. This substance is a known human carcinogen and is associated with an increased risk of developing lung cancer and cancer of the sinonasal cavity.

Nickel (II) oxide is an olive gray powder, insoluble in water and soluble in acids. It is produced industrially and used mainly as an intermediate in the production of nickel alloys and as a hydrogenation catalyst. Long-term inhalation of NiO is damaging to the lungs, causing lesions and in some cases cancer.

Sodium dichromate is an inorganic compound, containing hexavalent chromium. It is highly corrosive and is a strong oxidizing agent. Sodium dichromate is mainly used to produce other chromium compounds but is also used in drilling muds, in metal treatments, in wood preservatives, in the production of dyes and organic chemicals and as a corrosion inhibitor. Sodium dichromate primarily affects the respiratory system causing ulcerations, shortness of breath, bronchitis, pneumonia, and asthma but can also affect the gastrointestinal tract, liver, kidneys and immune system. This substance is a known human carcinogen and is associated with an increased risk of developing lung cancer and cancer of the sinonasal cavity.

Nickel (II) oxide is an olive gray powder, insoluble in water and soluble in acids. It is produced industrially and used mainly as an intermediate in the production of nickel alloys and as a hydrogenation catalyst. Long-term inhalation of NiO is damaging to the lungs, causing lesions and in some cases cancer.