CAS Number | 58-73-1 |
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Molecular Formula | C17H21NO |
Molecular Weight | 255.35 |
InChI Key | 3.3 |
Synonyms |
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Applications:
Separation of Diphenhydramine hydrochloride on Newcrom R1 HPLC column
February 16, 2018
Diphenhydramine hydrochloride can be analyzed by this reverse phase (RP) HPLC method with simple conditions. The mobile phase contains an acetonitrile (MeCN), water, and phosphoric acid. For Mass-Spec (MS) compatible applications the phosphoric acid needs to be replaced with formic acid. Smaller 3 µm particles columns available for fast UPLC applications. This liquid chromatography method is scalable and can be used for isolation impurities in preparative separation. It also suitable for pharmacokinetics.
Application Column
Newcrom R1
The Newcrom columns are a family of reverse-phase-based columns. Newcrom A, AH, B, and BH are all mixed-mode columns with either positive or negative ion-pairing groups attached to either short (25 Å) or long (100 Å) ligand chains. Newcrom R1 is a special reverse-phase column with low silanol activity.
Select optionsHPLC Separation of Acetaminophen, Phenylephrine, and Diphenhydramine
March 3, 2006
Primesep C separates acetaminophen (paracetamol), phenylephrine, and diphenhydramine– common over-the-counter cold and flu medication ingredients such as Tylenol products—by either an acetonitrile or phosphoric acid gradient. The HPLC separation uses a mobile phase of water, acetonitrile (MeCN, ACN), and phosphoric acid with ultraviolet (UV) detection at 210 nm.
Column | Primesep C, 4.6×150 mm, 5 µm, 100A |
Mobile Phase | MeCN |
Buffer | H3PO4 |
Flow Rate | 1.0 ml/min |
Detection | UV, 210 nm |
Class of Compounds |
Drug, Analgetic, Acid, Hydrophilic, Ionizable, |
Analyzing Compounds | Acetaminophen, Pseudoephedrine, Diphenhydramine |
Application Column
Primesep C
The Primesep family of mixed-mode columns offers a wide variety of stationary phases, boasting unprecedented selectivity in the separation of a broad array of chemical compounds across multiple applications. Corresponding Primesep guard columns, available with all stationary phases, do not require holders. SIELC provides a method development service available to all customers. Inquire about our specially-tailored custom LC-phases for specific separations.
Select optionsDiphenhydramine
Phenylephrine