Sodium Dehydroacetate
C8H7NaO4
190.13
190.132H-Pyran-2,4(3H)-dione, 3-acetyl-6-methyl-, monosodium salt
[4418-26-2].» Sodium Dehydroacetate contains not less than 98.0 percent and not more than 100.5 percent of C8H7NaO4, calculated on the anhydrous basis.
Packaging and storage—
Preserve in well-closed containers.
Identification—
A:
Dissolve about 1.5 g in 10 mL of water, add 5 mL of 3 N hydrochloric acid, collect the crystals by filtration with suction, wash with 10 mL of water, and dry at 80
for 4 hours: the crystals so obtained melt between 109 and 111 (see Melting Range or Temperature 
741
).
for 4 hours: the crystals so obtained melt between 109 and 111 (see Melting Range or Temperature 741).
B:
A solution (1 in 20) responds to the tests for Sodium 191.
191.
Water, Method I 921:
between 8.5% and 10.0%.
921:
between 8.5% and 10.0%.
Heavy metals, Method II 231:
0.001%.
231:
0.001%.
Assay—
Transfer to a 125-mL conical flask about 500 mg of Sodium Dehydroacetate, accurately weighed, dissolve it in 25 mL of glacial acetic acid containing p-naphtholbenzein TS which has been previously neutralized to a blue color, and titrate with 0.1 N perchloric acid VS to the original blue color. Each mL of 0.1 N perchloric acid is equivalent to 19.01 mg of C8H7NaO4.
Auxiliary Information—
Please check for your question in the FAQs before contacting USP.
Chromatographic Column—
| Topic/Question | Contact | Expert Committee |
| Monograph | Robert H. Lafaver, B.A.
Scientist 1-301-816-8335 |
(EM105) Excipient Monographs 1 |
USP32–NF27 Page 1342
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.