Environmental Engineering Reference
In-Depth Information
FIGURE 7.13
Basic structure of BPA.
HO
OH
TABLE 7.9
Data for Phenol, PCP, and BPA
Name
CAS Registration
Number
Chemical Formula
Carcinogenicity Rating
Phenol
108-95-2
C
6
H
5
OH
Group: A4
Pentachlorophenol
87-86-5
C
6
H
4
Cl
5
O
Group: A2
Bisphenol A (BPA)
80-05-7
C
15
H
16
O
2
Currently Under Evaluation
Source:
United States Environmental Protection Agency, Integrated Risk Information System
(IRIS), http://www.epa.gov/ncea/iris/intro.htm (accessed October 21, 2009), 2009b.
7.6.3 Amines
H
H
Amines are organic compounds that contain nitrogen and are
basic
.
Three widely used amine compounds include methylamine, dimeth-
ylamine, and trimethylamine, and they are prepared by the reaction
of ammonia with methanol in the presence of a silicoaluminate cata-
lyst (McMurry 2009). Amines are used in the manufacturing of dyes,
plant growth regulators, resins, as a precursor in the manufacturing of
tires, pharmaceuticals (ephedrine), pesticides, and surfactants (ATSDR
1999). Trimethylamine also forms naturally from decomposing plant
and animal matter. Amines are often a gas at room temperature and pressure and are very
soluble in water.
The basic structure of methylamine is shown in Figure 7.14. Table 7.10 presents the struc-
tural formula, CAS registration number, and carcinogenicity rating for methylamine,
dimethylamine, and trimethylamine (USEPA 2009b).
N
C
H
H
H
FIGURE 7.14
Basic molecular struc-
ture of methylamine.
7.6.4 Esters
Esters are a group of more than 50 compounds known collectively as acid derivatives.
Ester compounds contain a modified carboxylic acid group (-COOH), in which the acidic
TABLE 7.10
Data for Methylamine, Dimethylamine, and Trimethylamine
CAS Registration
Number
Name
Chemical Formula
Carcinogenicity Rating
Methylamine
74-89-5
CH
5
N
Not Available
Dimethylamine
124-40-3
C
2
H
7
N
Not Available
Trimethylamine
75-50-3
C
3
H
9
N
Not Available
Source:
United States Environmental Protection Agency, Integrated Risk Information
System (IRIS), http://www.epa.gov/ncea/iris/intro.htm (accessed October 21,
2009), 2009b.
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