Chloroform is a colorless, sweet-smelling, dense liquid and widely used industrial and laboratory solvent. The total global flux of chloroform through the environment is approximately 660 000 tonnes per year, and about 90% of emissions are natural in origin. Many kinds of seaweed produce chloroform, and fungi are believed to produce chloroform in soil. Chloroform is used as an industrial solvent and as an intermediate in the manufacture of polymeric materials. The major use of chloroformtoday is in the production of the refrigerant R-22, commonly used in the air conditioning business. Inhaled chloroform anesthesia was introduced in 1847 and Chloroform subsequently became the most widely used volatile anaesthetic, and was used in horses before the end of the 19th century. Pure chloroform is known to be decomposed by the air with the formation of hydrochloric acid, phosgene and carbon dioxide. Phosgene is also generated metabolically from chloroform, and liver and kidney damage can ensue from its production.

Acetamide is found in red beetroot. Acetamide (or acetic acid amide or ethanamide), CH3CONH2, the amide of acetic acid, is a white crystalline solid in pure form. It is produced by dehydrating ammonium acetate. In the past, acetamide was used as a plasticiser and as a stabiliser. Molten acetamide was frequently used as a solvent in chemical synthesis. It also acts as a solubiliser; its mere addition renders many sparingly soluble compounds more soluble in water. Acetamide has been classified by theInternational Agency for Research on Cancer (IARC) as a Group 2B possible human carcinogen, as feeding trials on rats have shown an increase in liver carcinoma.

Propylene Oxide is a synthetic, highly-flammable, volatile, colorless liquid that is soluble in water and miscible with many organic solvents. The major use of propylene oxide is in the production of polyethers (the primary component of polyurethane foams) and propylene glycol. Propylene oxide is also used in the fumigation of foodstuffs and plastic medical instruments and in the manufacture of dipropylene glycol and glycol ethers, as herbicides, as solvents, and in the preparation of lubricants, surfactants, and oil demulsifiers. Propylene Oxide is a chiral epoxide, although it is commonly used as a racemic mixture. Acute (short-term) exposure of humans and animals to propylene oxide has caused eye and respiratory tract irritation. Dermal contact, even with dilute solutions, has caused skin irritation and necrosis in humans. Propylene oxide is also a mild central nervous system (CNS) depressant in humans. Inflammatory lesions of the nasal cavity, trachea, and lungs and neurological effects have been observed in animals chronically (long-term) exposed to propylene oxide by inhalation.

Dichlorvos is a synthetic organic chemical used as an insecticide. Dichlorvos does not occur naturally in the environment, but is manufactured by industry. Dichlorvos is sold under many trade names including Vapona®, Atgard®, Nuvan®, and Task®. It is also used as an insecticide for slow release on pest-strips for pest control in homes.  Dichlorvos is used as an anthelmintic (worming agent) for dogs, swine, and horses, as a botacide (agent that kills fly larvae) for horses, and in flea collars for dogs. In 1995, EPA proposed cancellation of dichlorvos for all home uses, and for many commercial and industrial uses.

Methylthiouracil is an orally active thyroid enzyme activity inhibitor. Methylthiouracil was introduced in the mid-1940s for the treatment of hyperthyroidism. Methylthiouracil is no longer in clinical use in most countries, although it may be used to a limited degree in some eastern European countries. Methylthiouracil possess anti-inflammatory effects in vitro and in vivo and was found effective in a murine model of sepsis.

Niridazole is used (but not officially recommended) for the treatment of schistosomiasis, dracunculiasis and tungiasis. The mode of action of niridazole is not fully understood. The major action of niridazole seems to be on the glycogen metabolism of the helminths. The drug also case structural damage to the reproductive system of female schistosomes. Another possible mechanism of action of niridazole involves the inhibition of DNA synthesis in schistosomes. It is metabolized in the liver. The most serious side effects were those connected with the nervous area (convulsion, hallucination, etc.).

Trypan blue (trade name MembraneBlue, VisionBlue) is a vital stain used to selectively color dead tissues or cells blue. Live cells or tissues with intact cell membranes are not colored. Since cells are very selective in the compounds that pass through the membrane, in a viable cell trypan blue is not absorbed; however, it traverses the membrane in a dead cell. Hence, dead cells are shown as a distinctive blue color under a microscope. Since live cells are excluded from staining, this staining method is also described as a dye exclusion method. This dye may be a cause of certain birth defects such as encephalocele. Trypan blue is commonly used in microscopy (for cell counting) and in laboratory mice for assessment of tissue viability. The method cannot distinguish between necrotic and apoptotic cells. Trypan blue is also used in ophthalmic cataract surgery to stain the anterior capsule in the presence of a mature cataract, to aid in visualization, before creating the continuous curvilinear capsulorhexis.

Medroxyprogesterone acetate (INN, USAN, BAN), also known as 17α-hydroxy-6α-methylprogesterone acetate, and commonly abbreviated as MPA, is a steroidal progestin, a synthetic variant of the human hormone progesterone. Medroxyprogesterone acetate (MPA) administered orally or parenterally in the recommended doses to women with adequate endogenous estrogen, transforms proliferative into secretory endometrium. Androgenic and anabolic effects have been noted, but the drug is apparently devoid of significant estrogenic activity. While parenterally administered MPA inhibits gonadotropin production, which in turn prevents follicular maturation and ovulation, available data indicate that this does not occur when the usually recommended oral dosage is given as single daily doses. MPA is a more potent derivative of its parent compound medroxyprogesterone (MP). While medroxyprogesterone is sometimes used as a synonym for medroxyprogesterone acetate, what is normally being administered is MPA and not MP. Used as a contraceptive and to treat secondary amenorrhea, abnormal uterine bleeding, pain associated with endometriosis, endometrial and renal cell carcinomas, paraphilia in males, GnRH-dependent forms of precocious puberty, as well as to prevent endometrial changes associated with estrogens. Progestins diffuse freely into target cells in the female reproductive tract, mammary gland, hypothalamus, and the pituitary and bind to the progesterone receptor. Once bound to the receptor, progestins slow the frequency of release of gonadotropin releasing hormone (GnRH) from the hypothalamus and blunt the pre-ovulatory LH surge.