bromoform


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bromoform

A yellowish to colourless liquid with a pleasant odour and sweet taste, produced by action of bromine and caustic potash on wood spirit, alcohol or acetone; it is functionally similar to chloroform in effects. It is currently used as a solvent and flame retardant. 

Toxicology
Mucocutaneous and upper respiratory tract irritation, hepatotoxic, CNS toxicity.
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Points are colored by altitude, (a) Acetone (C[H.sub.3]COC[H.sub.3]) and (b) acetonitrile (C[H.sub.3]CN) were measured by TOGA, and (c) bromoform (CH[Br.sub.3]) and (d) dibromomethane (C[H.sub.2][Br.sub.2]) were measured by AWAS.
The toxicity of trihalomethanes (chloroform, bromodichloromethane, dibromochloromethane, and bromoform) is widely discussed [60-67], but their usage as water disinfectant persists.
The carrier gas was helium (5.7 psi) with an isothermal temperature of 45[degrees]C for bromoform, bromodichloromethane, and dibromochloromethane and for chloroform a temperature program of 45[degrees]C for 2.6 minutes with a ramp of 20[degrees]C/ min.
Volume Chloroform (ppb) Carbon Bromoform Benzene Toluene tetrachloride (ppb) (ppb) (ppb) (ppb) 100 <0.05 * <0.05 * <0.5 * <0.05 * <0.1 * 200 <0.05 * <0.05 * <0.5 * <0.05 * <0.1 * 300 <0.05 * <0.05 * <0.5 * <0.05 * <0.1 * * Values below the limit of quantification of the analytical method.
Standard solutions of 200 mg [L.sup.-1] of THM in methanol, including chloroform (CH[Cl.sub.3]), bromodichloromethane (CH[Cl.sub.2]Br), dibromochloromethane (CHCl[Br.sub.2]) and bromoform (CH[Br.sub.3]), were purchased from AccuStandard[R] (New Haven, USA).
Bromoform is produced naturally in small amounts by oceanic plants and then readily evaporates into the air due to its high volatility (Goodwin et al., 1997).
* Until recently, density measurements required the use of hazardous liquids, such as bromoform (Koons 2002).
Similar conformation changes, i.e., from an elongated rodlike to a globular structure, were also obtained when dichloromethane was substituted with bromoform or chloroform, respectively.
In addition, many macroalgae have cell-wall-located haloperoxidases, which are limited in their activity by [H.sub.2][O.sup.2] and which generate hypohalous acids and various halocarbons, such as bromoform (CH[Br.sub.3]) (Carpenter and Liss, 2000).
The 0.05-0.1 mm fraction was separated using bromoform and the light and heavy minerals were determined separately by the immersion method under the PM in plane and cross-polarized light.
The perfectly coated spheres could be separated by flotation in bromoform, thoroughly washed and dried.