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4-nitrobiphenyl is a white to yellow needle-like crystalline solid with a sweetish odor. (NIOSH, 2024) 4-Nitrobiphenyl is a member of biphenyls. Pnb has been used in trials studying the treatment of Pelvic Organ Prolapse. 4-Nitrobiphenyl is no longer manufactured or used in the United States. Limited information is available on the health effects of 4-nitrobiphenyl. Acute (short-term) exposure to 4-nitrobiphenyl in humans results in irritation of the eyes, mucous membranes, and respiratory tract, and headache, nausea, vomiting, and fatigue. Chronic (long-term) exposure to high concentrations of 4-nitrobiphenyl in workers has resulted in effects on the peripheral and central nervous systems and the liver and kidney. No information is available on the reproductive, developmental, or carcinogenic effects of 4-nitrobiphenyl in humans. EPA has not classified 4-nitrobiphenyl for carcinogenicity. 4-Nitrobiphenyl can cause cancer according to an independent committee of scientific and health experts.

5-nitroacenaphthene is a yellow powder. (NTP, 1992) 5-Nitroacenaphthene is a nitronaphthalene. 5-Nitroacenaphthene can cause cancer according to an independent committee of scientific and health experts.

Dictamnine is an oxacycle, an organonitrogen heterocyclic compound, an organic heterotricyclic compound and an alkaloid antibiotic. Dictamnine is a natural product found in Melicope triphylla, Zanthoxylum simulans, and other organisms with data available. A furoquinoline alkaloid, dictamnine, is very common within the family Rutaceae. It is the main alkaloid in the roots of Dictamnus albus and responsible for the mutagenicity of the drug derived from crude extracts. Dictamnine was also reported to be a phototoxic and photomutagenic compound. It participates in the severe skin phototoxicity of the plant.

Isodictamnine is an organic heterotricyclic compound, an oxacycle and an organonitrogen heterocyclic compound. Isodictamnine is a natural product found in Glycosmis pentaphylla, Boronia inornata, and other organisms with data available.

Indophenol is a quinone imine obtained by formal condensation of one of the keto groups of benzoquinone with the amino group of 4-hydroxyaniline. It has a role as a dye. A deep blue dye (with the formula OC6H4NC6H4OH) used to detect AMMONIA in a common test called the Berthelot's reaction and to detect PARACETAMOL by spectrophotometry.

3-Pyrid-4-ylbenzoic acid is a phenylpyridine.

A quinone imine obtained by formal condensation of one of the keto groups of benzoquinone with the amino group of 4-hydroxyaniline." []

Gold to tan crystals or brown solid. (NTP, 1992)