USP Labetalol Hydrochloride RS
Dry portion in vacuum at 105
for 4 hours before using. Keep container tightly closed. Protect from light.
USP Lactase RS
Do not dry before using. Keep container tightly closed. Store in a refrigerator. Before opening, allow to attain room temperature. Protect from air and humidity after opening.
USP Lactitol RS.
USP Anhydrous Lactose RS
Dry portion at 80
for 2 hours before using. Keep container tightly closed.
USP Lactose Monohydrate RS
For identification test, dry a portion at 80
for 2 hours. For quantitative use, determine the water content titrimetrically at the time of use. Keep container tightly closed.
USP Lactulose RS
Dry portion at 70
for 4 hours before using. Keep container tightly closed. Store between 2
and 30
.
USP Lamivudine RS
Do not dry. Keep container tightly closed. Protect from light. Store in a freezer.
USP Lamivudine Resolution Mixture A RS
Do not dry. Keep container tightly closed. Protect from light. Store in a freezer.
USP Lamivudine Resolution Mixture B RS
Do not dry. Keep container tightly closed. Protect from light, and store at controlled room temperature.
USP Lanolin RS
Keep container tightly closed, and store at controlled room temperature.
USP Lanolin Alcohols RS
Do not dry. Keep container tightly closed. Protect from light.
USP Lansoprazole RS
(C
16H
14F
3N
3O
2S
369.36)
Do not dry. Keep container tightly closed. Protect from light. Store in a cold place.
USP Lansoprazole Related Compound A RS
[2-[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridyl]methyl]sulfonyl]benzimidazole
]
(C
16H
14F
3N
3O
3S
385.36)
Do not dry. Keep container tightly closed. Protect from light. Store in a cold place.
Add the following:
USP Lauroyl Polyoxylglycerides RS
Store in original container and prevent exposure to air, heat, and moisture.
USP29
USP Letrozole RS
Do not dry.
USP Letrozole Related Compound A RS
[4,4
¢-(1
H-1,3,4-triazol-1-ylmethylene)dibenzonitrile
]
(C
17H
11N
5
285.31)
Do not dry. Keep container tightly closed. Protect from light.
USP L-Leucine RS
Do not dry before using. Keep container tightly closed.
USP Leucovorin Calcium RS
[NOTEThis material is extremely hygroscopic.] Do not dry; determine the water content titrimetrically at time of use for quantitative analyses. Keep container tightly closed. Protect from light.
USP Levamisole Hydrochloride RS
Do not dry. Keep container tightly closed. Protect from light.
USP Levmetamfetamine RS
Do not dry before using. Keep container tightly closed and protected from light.
USP Levobunolol Hydrochloride RS
Dry portion in vacuum over phosphorus pentoxide in a suitable drying tube at 110
for 4 hours before using. Keep container tightly closed and protected from light.
USP Levocarnitine RS
For quantitative use, determine the water content titrimetrically at the time of use. For IR identification use, dry portion at 50
in vacuum for 5 hours. Keep container tightly closed. This material is extremely hygroscopic.
USP Levocarnitine Related Compound A RS
[2-propen-1-aminium, 3-carboxy-
N,
N,
N-trimethyl-, chloride
]
(C
7H
14ClNO
2
179.65)
Do not dry. Keep container tightly closed. Store in a dry place.
USP Levodopa RS
Dry portion at 105
for 4 hours before using. Keep container tightly closed. Protect from light. Store in a dry place and prevent exposure to excessive heat.
USP Levodopa Related Compound A RS
[3-(3,4,6-trihydroxyphenyl)alanine
]
(C
9H
11NO
5
213.19)
Do not dry. Keep container tightly closed and protected from light. Store in a cool, dry place.
USP Levodopa Related Compound B RS
[3-methoxytyrosine
]
(C
10H
13NO
4
211.22)
Do not dry. Keep container tightly closed. Protect from light. Store in a cool, dry place.
USP Levonordefrin RS
Dry portion in vacuum at 60
for 15 hours before using. Keep container tightly closed.
USP Levorphanol Tartrate RS
This is the dihydrate form. Do not dry; determine the water content titrimetically at the time of use. Keep container tightly closed.
USP Levothyroxine RS
Use without drying; correct for moisture, determined by drying a separate portion in vacuum at 60
for 4 hours. Keep container tightly closed and protected from light.
USP Lidocaine RS
Dry portion in vacuum over silica gel for 24 hours before using. Keep container tightly closed.
USP Lincomycin Hydrochloride RS
Do not dry. This is the monohydrate form of lincomycin hydrochloride. Keep container tightly closed. Protect from light. Store in a cold place.
USP Lindane RS
Do not dry. Keep container tightly closed.
USP Linoleoyl Polyoxylglycerides RS
Store in original container, and prevent exposure to air, heat, and moisture.
Change to read:
USP Liothyronine RS
Do not dry before using.
Correct for moisture, determined by drying a separate portion in vacuum at 60
for 3 hours.
USP29 Keep container tightly closed. Protect from light.
Store in a refrigerator.
USP29
USP Alpha Lipoic Acid RS.
USP Lisinopril RS
This material is the dihydrate form of Lisinopril. Do not dry; determine the water content titrimetrically at time of use for quantitative analyses. Keep container tightly closed.
USP Lithium Carbonate RS
Dry portion at 200
for 4 hours before using. Keep container tightly closed. Store in a cool place.
USP Loperamide Hydrochloride RS
Do not dry. Keep container tightly closed. Protect from light.
USP Loracarbef RS
Do not dry before using. Keep container tightly closed, protected from light, and store in a cold place.
USP Loracarbef L-Isomer RS
Do not dry before using. Keep container tightly closed, protected from light, and store in a cold place.
USP Loratadine RS
Do not dry. Keep container tightly closed. Protect from light.
USP Loratadine Related Compound A RS
[8-chloro-6,11-dihydro-11(4-piperidylidene)-5H-benzo[5,6]cyclohepta[1,2-b]
pyridine]
(C
19H
19ClN
2
310.83)
Do not dry. Keep container tightly closed. Protect from light.
USP Loratadine Related Compound B RS
[8-chloro-6,11-dihydro-11(N-methyl-4-piperinylidene)-5H-benzo[5,6]cyclohepta[1,2-b] pyridine]
(C
20H
21ClN
2
324.88)
Do not dry. Keep container tightly closed. Protect from light.
USP Lorazepam RS
Do not dry. Keep container tightly closed. Protect from light.
USP Lorazepam Related Compound A RS
[7-chloro-5-(
o-chlorophenyl)-1,3-dihydro-3-acetoxy-2
H-1,4-benzodiazepin-2-one
]
(C
17H
12 Cl
2N
2O
3
363.20)
Do not dry. Keep container tightly closed and protected from light.
USP Lorazepam Related Compound B RS
[2-amino-2
¢,5-dichlorobenzophenone
]
(C
13H
9ClNO
266.13)
Do not dry before using. Keep container tightly closed and protected from light.
USP Lorazepam Related Compound C RS
[6-chloro-4-(
o-chlorophenyl)-2-quinazolinecarboxaldehyde
]
(C
15H
8Cl
2N
2O
303.15)
Do not dry before using. Keep container tightly closed. Protect from light.
USP Lorazepam Related Compound D RS
[6-chloro-4-(
o-chlorophenyl)-2-quinazolinecarboxylic acid
]
(C
15H
8Cl
2N
2O
2
319.15)
Do not dry before using. Keep container tightly closed. Protect from light.
USP Lorazepam Related Compound E RS
[6-chloro-4-(
o-chlorophenyl)-2-quinazoline methanol
]
(C
15H
10Cl
2N
2O
305.16)
Do not dry before using. Keep container tightly closed. Protect from light.
USP Lovastatin RS
Do not dry; use as is. Keep container tightly closed, and store in a freezer under nitrogen.
USP Lovastatin Related Compound A RS
[dihydro-lovastatin] [butanoic acid, 2-methyl-, 1,2,3,4,4a,7,8,8a-octahydro-3,7-dimethyl-8-[2(tetrahydro-4-hydroxy-6-oxo-2
H-pyran-2-yl)-ethyl]-1-naphthalenyl ester, [1
S-[1
(
R*),3
,7
,8
(2
S*,4
S*),-8
]]-
]
(C
24 H
38O
5
406.56)
Do not dry. This material is hygroscopic. Keep container tightly closed. Protect from light. Store in a refrigerator.
USP Loxapine Succinate RS
Dry portion at 105
for 4 hours before using. Keep container tightly closed.
USP Lutein RS
Do not dry. Keep container tightly closed, and store under nitrogen in a cool place. Protect from light.
USP Lycopene RS
.
USP L-Lysine Acetate RS
Do not dry. Keep container tightly closed.
USP L-Lysine Hydrochloride RS
Dry portion at 105
for 3 hours before using. This is the monohydrochloride form. Keep container tightly closed.