Errata - English

In Alcohol-Insoluble Matter/Sample solution: Change
100 mg/mL of Urea dissolved in warm alcohol
to:
Dissolve 5.0 g of Urea in 50 mL of warm alcohol.
AND
In Alcohol-Insoluble Matter/Analysis: Change
If any insoluble residue remains, pass the Sample solution through a tared filter, wash the residue and the filter with 20 mL of warm alcohol per 50 mL of Sample solution, and dry at 105° for 1 h.
to:
If any insoluble residue remains, pass the Sample solution through a tared filter, wash the residue and the filter with 20 mL of warm alcohol, and dry at 105° for 1 h.

In Dissolution 〈711〉/Test 1/Analysis: Change
Result = (r_U/r_S) × C_S × V × (1/L) × 100
r_U = peak response of linezolid from the Sample solution
r_S = peak response of linezolid from the Standard solution
C_S = concentration of USP Linezolid RS in the Standard solution (mg/mL)
V = volume of Medium, 900 mL
L = label claim (mg/Tablet)
to:
Result = (r_U/r_S) × C_S × V × (1/L) × D × 100
r_U = peak response of linezolid from the Sample solution
r_S = peak response of linezolid from the Standard solution
C_S = concentration of USP Linezolid RS in the Standard solution (mg/mL)
V = volume of Medium, 900 mL
L = label claim (mg/Tablet)
D = dilution factor of the Sample solution, as needed

In Test 6: Change
Times: 0.5, 1, and 4 h—for strengths 540 and 1080 mg as potassium citrate monohydrate; 0.5, 1, and 6 h—for strength 1620 mg as potassium citrate monohydrate.
to:
Times: 0.5, 1, and 4 h—for strength 540 mg as potassium citrate monohydrate; 0.5, 1, and 6 h—for strengths 1080 and 1620 mg as potassium citrate monohydrate.

Change
Proceed as directed in Identification test A under Metaproterenol Sulfate Inhalation Solution, beginning with “Allow the spots to dry”:
to:
Allow the spots to dry, and develop the chromatogram in a solvent system consisting of the upper layer of a freshly prepared mixture of butyl alcohol, water, and formic acid (50:25:7) until the solvent front has moved about three-fourths of the length of the plate. Remove the plate from the developing chamber, mark the solvent front, and allow the solvent to evaporate. Locate the spots on the plate by examination under short-wavelength UV light:

In Sample solution: Change
Transfer 1.0 g of the Nasal Spray to a 50-mL volumetric flask. Add about 40 mL of Diluent, and sonicate for 10 min until the supernatant is clear. Use the clear supernatant for analysis.
to:
Transfer 1.0 g of the Nasal Spray to a 50-mL volumetric flask. Add about 40 mL of Diluent, and sonicate for 10 min. Dilute with Diluent to volume, and shake. Allow to stand for 10 min until the supernatant is clear. Use the clear supernatant for analysis.

In Limit of Methanol (Methyl Alcohol) and Methyl Acetate/Analysis: Change
C_U = concentration of methanol (methyl alcohol) or methyl acetate in the Sample solution (mg/mL)
to:
C_U = concentration of Polyvinyl Alcohol in the Sample solution (mg/mL)

Change
A: The contents of the Capsules respond to Identification tests A and B under Theophylline Tablets.
B: The retention time of the major peak in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay.
to:
A: Triturate a quantity of the contents of Capsules, equivalent to about 500 mg of theophylline, with 10-mL and 5-mL portions of solvent hexane, and discard the solvent hexane. Triturate the residue with two 10-mL portions of a mixture of equal volumes of 6 N ammonium hydroxide and water, and filter each time. Evaporate the combined filtrates to about 5 mL, neutralize, if necessary, with 6 N acetic acid, using litmus, and then cool to about 15°, with stirring. Collect the precipitate on a filter, wash it with cold water, and dry at 105° for 2 hours: the theophylline so obtained melts between 270° and 274° (see Melting Range or Temperature 〈741〉, Procedures, Procedure for Class I). Retain the remaining portion of the theophylline for use in Identification test B.
B: The IR absorption spectrum of a potassium bromide dispersion of the residue obtained in Identification test A exhibits maxima only at the same wavenumbers as that of a potassium bromide dispersion of USP Theophylline RS.
C: The retention time of the major peak in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay.

Change
It responds to the Identification test under Penicillin G Benzathine Oral Suspension.
to:
Mix a portion of it with methanol to obtain a solution containing about 3000 Penicillin G Units per mL. Apply 20 µL of this test solution and 20 µL of a Standard solution of USP Penicillin G Benzathine RS in methanol containing 2.5 mg per mL to a suitable thin-layer chromatographic plate (see Chromatography 〈621〉) coated with a 0.25-mm layer of chromatographic silica gel, and allow the spots to dry. Using an unlined developing chamber, develop the chromatogram in a solvent system consisting of a mixture of methanol, acetonitrile, and ammonium hydroxide (70:30:3) until the solvent front has moved about three-fourths of the length of the plate. Remove the plate from the developing chamber, and allow to air-dry. Spray the plate uniformly with a spray reagent prepared as follows. Dissolve 20 g of tartaric acid and 1.7 g of bismuth subnitrate in 80 mL of water. Add 2.5 mL of this solution, 2.5 mL of potassium iodide solution (4 in 10), and 10 g of tartaric acid to 50 mL of water, and mix. Examine the chromatograms: the principal spot obtained from the test solution corresponds in R_F value to that obtained from the Standard solution.

Change
Proceed as directed in Identification test A under Metaproterenol Sulfate Inhalation Solution, beginning with “Allow the spots to dry”:
to:
Allow the spots to dry, and develop the chromatogram in a solvent system consisting of the upper layer of a freshly prepared mixture of butyl alcohol, water, and formic acid (50:25:7) until the solvent front has moved about three-fourths of the length of the plate. Remove the plate from the developing chamber, mark the solvent front, and allow the solvent to evaporate. Locate the spots on the plate by examination under short-wavelength UV light:

In Vitamin A, Method 3/Analysis: Change
C_S = concentration of retinyl acetate (C₂₃H₃₂O₂) from USP Vitamin A RS in the Standard solution (μg/mL)
to:
C_S = concentration of retinyl acetate (C₂₂H₃₂O₂) from USP Vitamin A RS in the Standard solution (μg/mL)

In USP Econazole Related Compound C RS: Change
1-(4-Chlorobenzyl)-3-{2-[(4-chlorobenzyl)oxy]-2-(2,4-dichlorophenyl)ethyl}-1H-imidazol-3-ium nitrate (salt).
C₂₅H₂₁Cl₁₄N₃O₄ 569.26
to:
1-(4-Chlorobenzyl)-3-{2-[(4-chlorobenzyl)oxy]-2-(2,4-dichlorophenyl)ethyl}-1H-imidazol-3-ium chloride.
C₂₅H₂₁Cl₅N₂O 542.71

In Test A: Change
It responds to the Identification test under Penicillin G Benzathine Oral Suspension: the spot obtained from the test solution, corresponding in R_F value to that obtained from the Standard solution, is completely resolved from a second spot, produced by penicillin G procaine.
to:
Mix a portion of it with methanol to obtain a solution containing about 3000 Penicillin G Units per mL. Apply 20 µL of this test solution and 20 µL of a Standard solution of USP Penicillin G Benzathine RS in methanol containing 2.5 mg per mL to a suitable thin-layer chromatographic plate (see Chromatography 〈621〉) coated with a 0.25-mm layer of chromatographic silica gel, and allow the spots to dry. Using an unlined developing chamber, develop the chromatogram in a solvent system consisting of a mixture of methanol, acetonitrile, and ammonium hydroxide (70:30:3) until the solvent front has moved about three-fourths of the length of the plate. Remove the plate from the developing chamber, and allow to air-dry. Spray the plate uniformly with a spray reagent prepared as follows. Dissolve 20 g of tartaric acid and 1.7 g of bismuth subnitrate in 80 mL of water. Add 2.5 mL of this solution, 2.5 mL of potassium iodide solution (4 in 10), and 10 g of tartaric acid to 50 mL of water, and mix. Examine the chromatograms: the principal spot obtained from the test solution corresponds in R_F value to that obtained from the Standard solution. The spot obtained from the test solution, corresponding in R_F value to that obtained from the Standard solution, is completely resolved from a second spot, produced by penicillin G procaine.