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preface to fifteenth edition

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8.30 SECTION 8<br />

TABLE 8.8<br />

pK a Values of Organic Materials in Water at 25C (Continued)<br />

Substance pK 1 pK 2 pK 3 pK 4<br />

Anhydroplatynecine 9.40<br />

Aniline<br />

4.60(1)<br />

2-Anilinoethylsulfonic acid<br />

3.80(1)<br />

3-Anilinoethylsulfonic acid<br />

4.85(1)<br />

Anthracene-1-carboxylic acid 3.68<br />

Anthracene-2-carboxylic acid 4.18<br />

Anthracene-9-carboxylic acid 3.65<br />

Anthraquinone-1-carboxylic acid 3.37<br />

(20C)<br />

Anthraquinone-2-carboxylic acid 3.42<br />

(20C)<br />

9,10-Anthraquinone monoxime 9.78<br />

9,10-Anthraquinone-1-sulfonic acid 0.27<br />

9,10-Anthraquinone-2-sulfonic acid 0.38<br />

Antipyrine<br />

1.45(1)<br />

Apomorphine (15C) 8.92<br />

D-()-Arabinose 12.34<br />

L-()-Arginine 2.17 9.04(1) 12.47(1)<br />

Arsenazo III [pK 5 10.5(4); pK 6<br />

1.2 2.7 7.9(3)<br />

12.0(5)]<br />

Arsenoacetic acid 4.67 7.68<br />

Arsenoacrylic acid 4.23 8.60<br />

Arsenobutanoic acid 4.92 7.64<br />

2-Arsenocro<strong>to</strong>nic acid 4.61 8.75<br />

3-Arsenocro<strong>to</strong>nic acid 4.03 8.81<br />

Arsenopentanoic acid 4.89 7.75<br />

L-()-Ascorbic acid (vitamin C) 4.17 11.57<br />

L-()-Asparagine 2.01(0) 8.80(1)<br />

L-Asparaginylglycine 4.53 9.07<br />

D-Aspartic acid 1.89(0) 3.65 9.60<br />

Aspartic diamide ( 0.2) 7.00<br />

Aspartylaspartic acid 3.40 4.70 8.26<br />

-Aspartylhistidine (38C, 0.1) 3.02 6.82 7.98<br />

-Aspartylhistidine (38C, 0.1) 2.95 6.93 8.72<br />

N-Aspartyl-p-tyrosine ( 0.01) 3.57 8.92 10.23(OH)<br />

Aspidospermine 7.65<br />

Atropine (17C)<br />

4.35(1)<br />

1-Azacycloheptane<br />

11.11(1)<br />

1-Azacyclooctane<br />

11.1(1)<br />

Azetidine<br />

11.29(1)<br />

Aziridine<br />

8.04(1)<br />

Barbituric acid 8.372(0)<br />

m-Benzbetaine<br />

3.217(1)<br />

p-Benzbetaine<br />

3.245(1)<br />

Benzenearsonic acid (22C)<br />

8.48(1)<br />

Benzene-1-arsonic acid-4-carboxylic<br />

4.22<br />

5.59<br />

acid<br />

(COOH)<br />

Benzeneboronic acid 13.7<br />

Benzene-1-carboxylic acid-2-phosphoric<br />

3.78 9.17<br />

acid<br />

Benzene-1-carboxylic acid-3-phosphoric<br />

acid<br />

4.03 7.03

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