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Stains, Fluorescent Dyes & Histology Reagents

α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.

BP/USP/EP/Ph. Eur.Available on request

Buy α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur. (CAS 145-50-6) from Zemixal. Request a quote with price, lead time and documents.

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α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur. chemical structure
CAS number145-50-6
FormulaC27H18O2
Molar mass374.4 g/mol
HS code29145000
InChIKeyVDDWRTZCUJCDJM-SOYKGTTHSA-N
IUPAC name(4E)-4-[(4-hydroxynaphthalen-1-yl)-phenylmethylidene]naphthalen-1-one

About α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.

Zemixal supplies α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur. within its laboratory Chemicals & Reagents portfolio. For your records (BP/USP/EP/Ph. Eur.), the material is defined by CAS 145-50-6, formula C27H18O2 and molar mass 374.4 g/mol.

Typical applications

  • Histology & cytology staining
  • Microscopy
  • Clinical laboratories

Handling and storage

It carries the GHS signal word Warning (H315, H319 and H335), so wear gloves and eye protection and work with good ventilation.

Available as 5 g and 25 g. Larger or split packs can be arranged. Every shipment includes a batch certificate of analysis and a 16-section SDS. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Typical uses

  • Histology & cytology staining
  • Microscopy
  • Clinical laboratories

Applications

Diagnostics, Life Science and BiotechResearch Labs and UniversitiesTextiles, Dyes and Leather

Grade guides

BP Grade (British Pharmacopoeia)USP Grade (United States Pharmacopeia)Ph. Eur. Grade (European Pharmacopoeia)

Specifications and identifiers

Specifications of α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.
Product nameα-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.
Catalogue numberZX-038683
CAS number145-50-6
IUPAC name(4E)-4-[(4-hydroxynaphthalen-1-yl)-phenylmethylidene]naphthalen-1-one
Molecular formulaC27H18O2
Molar mass374.4 g/mol
Exact mass374.1307
GradeBP/USP/EP/Ph. Eur.
XLogP36.6
H-bond donors / acceptors1 / 2
Topological polar surface area37.3 Ų
HS code29145000
InChIKeyVDDWRTZCUJCDJM-SOYKGTTHSA-N
SMILESC1=CC=C(C=C1)/C(=C\2/C=CC(=O)C3=CC=CC=C23)/C4=CC=C(C5=CC=CC=C54)O
PubChem CID3033966
Synonymsp-Naphtholbenzein, 1(4H)-Naphthalenone, 4-[(4-hydroxy-1-naphthalenyl)phenylmethylene]-, 1(4H)-Naphthalenone, 4-((4-hydroxy-1-naphthalenyl)phenylmethylene)-, alphaNaphtholbenzein, 4(alpha(4Hydroxy1naphthyl)benzylidene)naphthalen1(4H)one, 1(4H)Naphthalenone, 4(alpha(4hydroxy1naphthyl)benzylidene), 1(4H)Naphthalenone, 4((4hydroxy1naphthalenyl)phenylmethylene), 1(4H)Naphthalenone, 4(alpha(4hydroxy1naphthyl)benzylidene) (8CI), 1-Naphtholbenzein, 4-[(4-Hydroxy-1-naphthalenyl)phenylmethylene]-1(4H)-naphthalenone, Naphtholbenzein, .alpha.-Naphtholbenzein

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

GHS07 Irritant or harmful
Irritant or harmful

Signal word Warning

  • H315Causes skin irritation
  • H319Causes serious eye irritation
  • H335May cause respiratory irritation

Precautionary statements P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.
5 gQuoted on request
25 gQuoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.

Which CAS number identifies α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.?
α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur. is registered under CAS 145-50-6. You may also see it listed as p-Naphtholbenzein, 1(4H)-Naphthalenone, 4-[(4-hydroxy-1-naphthalenyl)phenylmethylene]-, 1(4H)-Naphthalenone, 4-((4-hydroxy-1-naphthalenyl)phenylmethylene)-. Our catalogue number for this item is ZX-038683.
What are the formula and molar mass of α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.?
For α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur., its formula is C27H18O2 and its molar mass is 374.4 g/mol. The systematic (IUPAC) name is (4E)-4-[(4-hydroxynaphthalen-1-yl)-phenylmethylidene]naphthalen-1-one. InChIKey VDDWRTZCUJCDJM-SOYKGTTHSA-N lets you match it in any structure database.
What grade and pack sizes are available for α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.?
This listing is BP/USP/EP/Ph. Eur. grade. Standard packs are 5 g, 25 g. Larger quantities and custom packing can be quoted on request.
Which documents come with α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur.?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur. to my country?
Yes. Because α-Naphtholbenzein (pH Indicator), BP/USP/EP/Ph. Eur. is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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