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Indicators, Chelating Agents & Test Papers

α-Naphthol phthalein, AR

ARAvailable on request

α-Naphthol phthalein, AR (CAS 596-01-0) supplier Zemixal. Request a quote with price, lead time and documents. Catalogue no. ZX-037455.

Pack sizes
α-Naphthol phthalein, AR chemical structure
CAS number596-01-0
FormulaC28H18O4
Molar mass418.4 g/mol
HS code29322990
InChIKeyHQHBAGKIEAOSNM-UHFFFAOYSA-N
IUPAC name3,3-bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one

About α-Naphthol phthalein, AR

Researchers and plant chemists source α-Naphthol phthalein, AR from Zemixal for routine and specialised work. For your records (AR), the material is defined by CAS 596-01-0, formula C28H18O4 and molar mass 418.4 g/mol.

Typical applications

  • Titration end-point detection
  • pH determination
  • Analytical testing

Safe handling

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

Standard pack sizes are 1 g and 5 g, and custom quantities are quoted on request. You receive a batch certificate of analysis and a 16-section SDS with each order. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Typical uses

  • Titration end-point detection
  • pH determination
  • Analytical testing

Applications

Research Labs and Universities

Grade guides

AR Grade (Analytical Reagent)

Specifications and identifiers

Specifications of α-Naphthol phthalein, AR
Product nameα-Naphthol phthalein, AR
Catalogue numberZX-037455
CAS number596-01-0
IUPAC name3,3-bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one
Molecular formulaC28H18O4
Molar mass418.4 g/mol
Exact mass418.1205
GradeAR
XLogP36.3
H-bond donors / acceptors2 / 4
Topological polar surface area66.8 Ų
HS code29322990
InChIKeyHQHBAGKIEAOSNM-UHFFFAOYSA-N
SMILESC1=CC=C2C(=C1)C(=CC=C2O)C3(C4=CC=CC=C4C(=O)O3)C5=CC=C(C6=CC=CC=C65)O
PubChem CID68993
Synonymsalpha-Naphtholphthalein, 3,3-Bis(4-hydroxy-1-naphthyl)phthalide, 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-1-naphthalenyl)-, 1-Naphtholphthalein, 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, a-naphtholphthalein, 3,3-bis(4-hydroxynaphthalen-1-yl)-1,3-dihydro-2-benzofuran-1-one, A-Naphtholphthalein, naphtholphthalein blue, a-Naphtolphtalein, .alpha. Naphtholphthalein

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-Naphthol phthalein, AR
1 gQuoted on request
5 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-Naphthol phthalein, AR

Which CAS number identifies α-Naphthol phthalein, AR?
α-Naphthol phthalein, AR is registered under CAS 596-01-0. You may also see it listed as alpha-Naphtholphthalein, 3,3-Bis(4-hydroxy-1-naphthyl)phthalide, 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-1-naphthalenyl)-. Our catalogue number for this item is ZX-037455.
What are the formula and molar mass of α-Naphthol phthalein, AR?
For α-Naphthol phthalein, AR, its formula is C28H18O4 and its molar mass is 418.4 g/mol. The systematic (IUPAC) name is 3,3-bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one. InChIKey HQHBAGKIEAOSNM-UHFFFAOYSA-N lets you match it in any structure database.
What grade and pack sizes are available for α-Naphthol phthalein, AR?
This listing is AR grade. Standard packs are 1 g, 5 g. Larger quantities and custom packing can be quoted on request.
Which documents come with α-Naphthol phthalein, AR?
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-Naphthol phthalein, AR to my country?
Yes. Because α-Naphthol phthalein, AR 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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