USP Acebutolol Hydrochloride RS
Dry portion at 105for 3hours before using.Keep container tightly closed.
USP Acepromazine Maleate RS
Dry portion at 105for 4hours before using.Keep container tightly closed and protected from light.
USP Acesulfame Potassium RS—
Do not dry.Keep container tightly closed.
USP Acetaminophen RS
Dry portion over silica gel for 18hours before using.Keep container tightly closed and protected from light.
USP Acetanilide Melting Point RS
Dry portion over sulfuric acid for 16hours before using.When melted by the capillary tube method,Class Iain chapter á741ñMelting Range and Temperature,the observed range falls within the indicated acceptance range.Keep container tightly closed.
USP Acetazolamide RS
Dry portion at 105for 4hours before using.Keep container tightly closed.
USP Acetohexamide RS
Dry portion at 105for 3hours before using.Keep container tightly closed.
USP Acetohydroxamic Acid RS
Dry portion over phosphorus pentoxide for 16hours before using.Keep container tightly closed,and store in a desiccator in a cool place. Change to read:
USPa-d-2-Acetoxy-4-dimethylamino-1,2-diphenyl-3-methylbutane RS—
(NAME CHANGE)See USP Propoxyphene Related Compound B RS.USP28
USP Acetylcholine Chloride RS
—Dry portion at 105for 3hours before using.Once opened,store in a desiccator,and keep container tightly closed.This material is extremely hygroscopic.
USP Acetylcysteine RS
—Dry portion at a pressure of about 50mm of mercury at 70for 4hours before using.Keep container tightly closed.
USP Acetyltributyl Citrate RS
—Do not dry before using.After opening the ampul,keep the material in a tightly closed container.
USP Acetyltriethyl Citrate RS
—Do not dry before using.After opening the ampul,keep the material in a tightly closed container.
USP Acyclovir RS
—Do not dry;determine the water content titrimetrically at the time of use for quantitative analyses.Keep container tightly closed.
USP Adenine RS
—Dry portion at 110for 4hours before using.Keep container tightly closed and protected from light.
USP Adenosine RS
—Keep container tightly closed and protected from light.
USP Agigenin RS
—Do not dry before using.Keep container tightly closed.Protect from light.Store in a freezer.
USPL-Alanine RS
—Dry portion at 105for 3hours before using.Keep container tightly closed.
USP Albendazole RS
—Dry portion at 105for 4hours before using.Keep container tightly closed.
USP Albuterol RS
—Do not dry before using.Keep container tightly closed and protected from light.
USP Albuterol Sulfate RS
—Do not dry before using.Keep container tightly closed and protected from light.
USP Alclometasone Dipropionate RS
—Do not dry before using.Keep container tightly closed. Add the following:
USP Alcohol Determination—Acetonitrile RS
—Acetonitrile in water.Dispose of unused portion after opening.USP28 Add the following:
USP Alcohol Determination—Alcohol RS
—Alcohol solution in water.Dispose of unused portion after opening.USP28 Add the following:
USP Alendronate Sodium RS
—Do not dry.This is the trihydrate form of alendronate sodium.Keep container tightly closed.After opening,store in a desiccator at room temperature.USP28
USP Alfentanil Hydrochloride RS.

USP Allantoin RS—
Do not dry.Keep container tightly closed.
USP Alliin RS
—Do not dry before using.Keep container tightly closed,and store in a refrigerator.After opening,store the container in a desiccator in a refrigerator.
USP Allopurinol RS
—Dry portion in vacuum at 105for 5hours before using.Keep container tightly closed.
USP Allopurinol Related Compound A RS
[3-amino-4-carboxamidopyrazole hemisulfate] (C4H6N4O)2·H2SO4 350.32) —Dry portion in vacuum at 105for 3hours before using.Keep container tightly closed.
USPS-Allyl-L-Cysteine RS
—Do not dry before using.Keep container tightly closed.Store in a freezer.
USP Alprazolam RS
—Do not dry before using.Keep container tightly closed.
USP Alprostadil RS
—Do not dry before using.Keep container tightly closed,and store in a freezer.
USP Alteplase RS.

USP Altretamine RS
—Do not dry before using.Determine the water content titrimetrically at the time of use.Keep container tightly closed.
USP Dried Aluminum Hydroxide Gel RS
—Do not dry before using.Keep container tightly closed.
USP Amantadine Hydrochloride RS
—Do not dry before using.Keep container tightly closed.
USP Amcinonide RS
—Do not dry before using.Keep container tightly closed.Store in a refrigerator.
USP Amifostine RS
—Do not dry.
USP Amifostine Disulfide RS
[1,3-propanediamine,N,N-(dithiodi-2,1ethanediyl)bis,tetrahydrochloride] (C10H30N4S2Cl4 412.32) —Do not dry.Keep container tightly closed.Store in a freezer.
USP Amifostine Thiol RS
[ethanethiol,2-[(3-aminopropyl)amino]-,dihydrochloride] (C5H16N2SCl2 207.17) —Do not dry.Keep container tightly closed.Store in a freezer.
USP Amikacin RS
Do not dry before using.Keep container tightly closed,protected from light,and store in a cold place.
USP Amiloride Hydrochloride RS
Using thermogravimetric analysis (see Thermal Analysis á891ñ),heat a 10-mg portion,accurately weighed,at 10per minute between ambient temperature and 225under nitrogen flowing at 40mLper minute.From the thermogram,determine the accumulated loss in weight between ambient temperature and about 200on the plateau.Keep container tightly closed.
USP Amiloxate RS[isoamyl methoxycinnamate].

USP Aminobenzoate Potassium RS
Dry portion at 105for 2hours before using.Keep container tightly closed and protected from light.
USP Aminobenzoic Acid RS
Do not dry.Keep container tightly closed.Protect from light.
USP Aminobutanol RS
(C4H11NO 89.14) —This material is hygroscopic.After opening ampul,store in tightly closed container.Do not dry;determine the water content titrimetrically at the time of use.
USP Aminocaproic Acid RS
Dry portion at 105for 30minutes before using.Keep container tightly closed.
USPN-(Aminocarbonyl)-N-[([5-nitro-2-furanyl]-methylene)-amino]-glycine RS
Do not dry before using.
USP2-Amino-5-chlorobenzophenone RS
(C13H10ClNO 231.68) —Keep container tightly closed and protected from light.Dry portion over silica gel for 4hours before using.
USP3-Amino-6-chloro-1-methyl-4-phenylcarbostyril RS—
(NAME CHANGE)See USP Diazepam Related Compound B RS.
USP3-Amino-2,4,6-triiodobenzoic Acid RS
(C7H4I3NO2 514.83) —Dry portion at 105for 4hours before using.Keep container tightly closed and protected from light.
USP5-Amino-2,4,6-triiodo-N-methylisophthalamic Acid RS
(C9H7I3N2O3 571.88) —Dry portion at 105for 4hours before using.Keep container tightly closed and protected from light.
USP Aminoglutethimide RS
Dry portion at 105to constant weight before using.Keep container tightly closed.
USPm-Aminoglutethimide RS
Do not dry before using.Keep container tightly closed.
USP Aminohippuric Acid RS
Do not dry before using.Keep container tightly closed and protected from light.Material will discolor if exposed to light and air.
USP5-Aminoimidazole-4-carboxamide Hydrochloride RS
(C4H6N4O·HCl 162.58) —Do not dry before using.Keep container tightly closed,protected from light,and store in a refrigerator.
USP Aminopentamide Sulfate RS
Dry at 105for 4hours before using.
USPm-Aminophenol RS
Do not dry before using.Keep container tightly closed,protected from light,and store in a cold place.
USP Aminosalicylic Acid RS
Dry portion in vacuum at 50for 1hour before using.Keep container tightly closed,protected from light,and store at a temperature not exceeding 30.
USP Amitraz RS—
Do not dry.Keep container tightly closed.Protect from light.
USP Amitriptyline Hydrochloride RS
Dry portion at a pressure not exceeding 5mm of mercury at 60to constant weight before using.Keep container tightly closed.
USP Ammonio Methacrylate Copolymer,Type A RS
Dry portion in vacuum at 80for 5hours before using.Keep container tightly closed.
USP Ammonio Methacrylate Copolymer,Type B RS
Dry portion in vacuum at 80for 5hours before using.Keep container tightly closed.
USP Ammonium Chloride RS—
Dry over silica gel for 4hours.This material is hygroscopic.Keep container tightly closed.Store at room temperature.
USP Amobarbital RS
Dry portion at 105for 4hours before using.Keep container tightly closed.
USP Amodiaquine Hydrochloride RS
Do not dry;determine the water content titrimetrically at the time of use.Keep container tightly closed.
USP Amoxapine RS
Dry portion at 105for 4hours before using.Keep container tightly closed.
USP Amoxicillin RS
Do not dry before using.This is a trihydrate form of amoxicillin.Keep container tightly closed.Protect from light,and store in a freezer.
USP Amphotericin B RS
Dry portion in vacuum at a pressure not exceeding 5mm of mercury at 60for 3hours before using.Keep container tightly closed.Protect from light.Store in a cold place.
USP Ampicillin RS
This is the anhydrous form of ampicillin.Before using,dry portion to constant weight in vacuum over phosphorus pentoxide at room temperature.Keep container tightly closed.Store in a cool,dry place.
USP Ampicillin Sodium RS
Do not dry before using.Hygroscopic.Keep container tightly closed.Store in a cool,dry place.
USP Ampicillin Trihydrate RS
Do not dry before using.Keep container tightly closed and protected from light.Store in a cold,dry place.
USP Amprolium RS
Dry portion at a pressure not exceeding 5mm of mercury at 100for 3hours before using.Keep container tightly closed.
USP Anileridine Hydrochloride RS
Dry portion at a pressure below 5mm of mercury at 100for 2hours before using.Keep container tightly closed.Protect from light.
USP Antazoline Phosphate RS
Dry portion at 105for 4hours before using.Keep container tightly closed.
USP Anthralin RS
Do not dry before using.Keep container tightly closed,and store in a cool place.Protect from light.
USP Antipyrine RS
Dry portion at 60for 2hours before using.Keep container tightly closed.
USP Apigenin-7-Glucoside RS
Do not dry.For quantitative USPapplications use a value of 0.88mg of apigenin-7-glucoside for each mg of this standard on the as is basis.Keep container tightly closed,protected from light,and store in a freezer.
USP Apomorphine Hydrochloride RS
Dry portion at 105for 2hours before using.Keep container tightly closed.Protect from light.
USP Apraclonidine Hydrochloride RS
Dry portion in vacuum at 105for 3hours before using.Keep container tightly closed.Protect from light.
USPL-Arginine RS
Dry portion at 105for 3hours before using.Keep container tightly closed.
USP Arginine Hydrochloride RS
Do not dry.Keep container tightly closed.
USP Arsanilic Acid RS
Do not dry.Keep container tightly closed.
USP Ascorbic Acid RS
Do not dry.Keep container tightly closed and protected from light. Add the following:
USP Asparagine RS.
USP28
USP Aspartame RS
Do not dry before using.Keep container tightly closed.Protect from light.Store in a desiccator.
USP Aspartame Acesulfame RS—
Do not dry.Keep container tightly closed.
USP Aspartame Related Compound A RS
[5-benzyl-3,6-dioxo-2-piperazineacetic acid] (C13H14N2O4 262.27) —Do not dry.Keep container tightly closed and protected from light.
USP Aspartic Acid RS
Do not dry.Store at room temperature.
USP Aspirin RS
Dry portion over silica gel for 5hours before using.Keep container tightly closed.
USP Astemizole RS
Dry at 105in vacuum for 4hours before using.Keep container tightly closed.
USP Atenolol RS
Dry portion at 105for 3hours before using.Keep container tightly closed.
USP Atovaquone RS
Do not dry before using.
USP Atovaquone Related Compound A RS
[cis-2[4-(4-chlorophenyl)cyclohexyl]-3-hydroxy-1,4-naphthoquinone]— Do not dry before using.
USP Atracurium Besylate RS
Do not dry;determine the water content titrimetrically at the time of use.Keep container tightly closed,and store in a cold place.
USP Atropine Sulfate RS
Do not dry before using.Determine the water content titrimetrically at the time of use.Keep container tightly closed.Protect from light.
USP Aurothioglucose RS
Dry portion over phosphorus pentoxide for 24hours before using.Keep container tightly closed.Protect from light.
USP Avobenzone RS
Dry portion in vacuum at 70for 4hours before using.For quantitative applications use a value of 0.994mg of avobenzone per mg on the dried basis.Keep container tightly closed.
USP Azaerythromycin A RS
Do not dry before using.Keep container tightly closed.
USP Azaperone RS
Dry portion in vacuum at 60for 4hours before using.Keep container tightly closed.Protect from light.
USP Azatadine Maleate RS
Do not dry.Keep container tightly closed.
USP Azathioprine RS
Dry portion in vacuum at 105for 5hours before using.Keep container tightly closed.Protect from light.
USP Azithromycin RS
Do not dry before using.Keep container tightly closed,and store in a freezer.
USP Azo-aminoglutethimide RS
Dry portion at 105for 2hours before using.Keep container tightly closed.Protect from light.
USP Aztreonam RS
Do not dry before using.Keep container tightly closed.Protect from light.Store in a cold place.
USP Aztreonam E-Isomer RS
Do not dry before using.Keep container tightly closed,protected from light,air,and moisture,and store in a refrigerator.
USP Open Ring Aztreonam RS
(C18H19N5O9S2 453.46) —Do not dry before using.Keep container tightly closed,protected from light,and store in a freezer.This material is extremely hygroscopic.