Drug Impurities Reference Standards Archives - Page 8 of 139

Showing 113–128 of 2209 results

4-Aminodiphenylsulfone
- Product Number DAP-12-004
- Parent Drug Dapsone
- CAS Number 7019-01-4
- Category Drug Impurities Reference Standards
In Stock - Ready to Ship
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+ Synonyms -Dapsone Impurity 3
4-Aminosalicylic Acid Reference Standard
- Product Number ACA-161220-0004
- Parent Drug Mesalamine
- CAS Number 65-49-6
- Category Drug Impurities Reference Standards
In Stock - Ready to Ship
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+ Synonyms -4-Amino-2-hydroxybenzoic acid EP Impurity E

+ Related Categories -Compendial Impurities
4-Chloroaniline-D4 (LaboTecc product)
- Product Number LT-10622-38
- Parent Drug Deuterated Building Blocks
- CAS Number 191656-33-4
- Category Drug Impurities Reference Standards
Made to Order - Lead Time: 1 to 2 week(s)
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4-Chlorodiphenylsulfone
- Product Number DAP-12-006
- Parent Drug Dapsone
- CAS Number 80-00-2
- Category Drug Impurities Reference Standards
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+ Synonyms -Dapsone Impurity 5
4-Chloronitrobenzene-D4 (LaboTecc Product)
- Product Number LT-10622-51
- Parent Drug Deuterated Building Blocks
- CAS Number 68239-23-6
- Category Drug Impurities Reference Standards
Temporarily Out of Stock
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4-Chlorotoluene-2,3,5,6-D4 (LaboTecc Product)
- Product Number LT-10622-54
- Parent Drug Deuterated Building Blocks
- CAS Number 85577-24-8
- Category Drug Impurities Reference Standards
Temporarily Out of Stock
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4-Dimethyl Aminopyridine
- Product Number B-71123-0007
- Parent Drug Penciclovir
- CAS Number 1122-58-3
- Category Drug Impurities Reference Standards
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4-Dimethylphenylsilyl-Entecavir
- Product Number ACC-160829-0001
- Parent Drug Entecavir
- CAS Number 701278-07-1
- Category Drug Impurities Reference Standards
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4-Epi Doxycycline
- Product Number ACA-160810-0001
- Parent Drug Doxycycline
- CAS Number 6543-77-7
- Category Drug Impurities Reference Standards
Pending QC
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+ Synonyms -(4R,4aR,5S,5aR,6R,12aS)-4-(Dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,5,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide
4-Epi Doxycycline Hydrochloride
- Product Number ACA-160824-0002
- Parent Drug Doxycycline
- CAS Number N/A
- Category Drug Impurities Reference Standards
Pending QC
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4-Fluoroaniline HCl Genotoxic Impurity Qualified Reference Standard
- Product Number B-70831-10
- Parent Drug Cabozantinib
- Category Drug Impurities Reference Standards
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+ Synonyms -4-Fluoroaniline Hydrochloride

+ Related Categories -Genotoxic Impurity
4-Hydroxy-3-nitrophenylacetic Acid-D5
- Product Number ACB-161028-0053
- Parent Drug Nitrotyrosine
- CAS Number 929709-59-1
- Category Drug Impurities Reference Standards
Pending QC
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+ Synonyms -4-Hydroxy-3-nitrobenzeneacetic Acid-d5
4-Isothiocyanato-3,5-dimethylphenol
- Product Number ACA-160801-0025
- Parent Drug Isothiocyanates
- CAS Number 1246818-00-7
- Category Drug Impurities Reference Standards
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+ Synonyms -4-Hydroxy-2,6-dimethylphenylisothiocyanate, 4-Hydroxy Xylazine precursor
4-Isothiocyanatophenol
- Product Number ACA-160801-0021
- Parent Drug Isothiocyanates
- CAS Number 2131-60-4
- Category Drug Impurities Reference Standards
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+ Synonyms -4-Hydroxyphenylisothiocyanate
4-Methyl Erlotinib Hydrochloride
- Product Number ERL-16-003
- Parent Drug Erlotinib
- CAS Number 183319-69-9 (parent)
- Category Drug Impurities Reference Standards
Made to Order - Lead Time: 1 week(s)
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4-Methylenepiperidine HCl Impurity Certified Reference Standard
- Product Number B-70926-0003
- Parent Drug Efinaconazole
- CAS Number 144230-50-2
- Category Drug Impurities Reference Standards
Pending QC
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+ Synonyms -4-Methylenepiperidine Hydrochloride

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