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ChemicalBook >> CAS DataBase List >> alpha-Naphtholphthalein

alpha-Naphtholphthalein

alpha-Naphtholphthalein price.
  • $37 - $2850
  • Product name: alpha-Naphtholphthalein
  • CAS: 596-01-0
  • MF: C28H18O4
  • MW: 418.44
  • EINECS:209-875-5
  • MDL Number:MFCD00036202
  • Synonyms:1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-1-naphthalenyl)-;à-naphtholphthalein;3,3-bis(4-hydroxy-1-naphthyl)phthalide;A-NAPHTHOLPHTHALEIN PRACTICAL GRADE;ALPHA-NAPHTHOLPHTHALEIN INDICATOR;1-NAPHTHOLPHTHALEIN, INDICATOR;ALPHA-NAPHTHOLPHTHALEIN(0.1% IN CA. 50% ETHANOL)[FOR PH DETERMINATION];alpha-Naphtholphthalein, indicator, pure
21 prices
Selected condition：
Brand
  • AHH
  • AK Scientific
  • Alfa Aesar
  • Alichem
  • American Custom Chemicals Corporation
  • Chemenu
  • Chem-Impex
  • Crysdot
  • Sigma-Aldrich
  • TCI Chemical
  • TRC
Package
  • 10mg
  • 1g
  • 5g
  • 10g
  • 25g
  • 100g
  • ManufacturerAHH
  • Product numberMT-19328
  • Product description1-Naphtholphthalein 85%
  • Packaging25g
  • Price$628
  • Updated2021-12-16
  • Buy
  • ManufacturerAK Scientific
  • Product numberZ3617
  • Product descriptionalpha-Naphtholphtalein
  • Packaging25g
  • Price$399
  • Updated2021-12-16
  • Buy
  • ManufacturerAlfa Aesar
  • Product number041221
  • Product descriptionalpha-Naphtholphthalein
  • Packaging1g
  • Price$41.65
  • Updated2024-03-01
  • Buy
  • ManufacturerAlfa Aesar
  • Product number041221
  • Product descriptionalpha-Naphtholphthalein
  • Packaging5g
  • Price$120.65
  • Updated2024-03-01
  • Buy
  • ManufacturerAlfa Aesar
  • Product number041221
  • Product descriptionalpha-Naphtholphthalein
  • Packaging25g
  • Price$405.65
  • Updated2024-03-01
  • Buy
  • ManufacturerAlichem
  • Product number596010
  • Product description3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one
  • Packaging25g
  • Price$250.92
  • Updated2021-12-16
  • Buy
  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberCHM0018271
  • Product descriptionALPHA-NAPHTHOLPHTHALEIN 95.00%
  • Packaging1G
  • Price$657.01
  • Updated2021-12-16
  • Buy
  • ManufacturerChemenu
  • Product numberCM140840
  • Product description3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one 95%
  • Packaging25g
  • Price$230
  • Updated2021-12-16
  • Buy
  • ManufacturerChem-Impex
  • Product number42481
  • Product descriptionα-Naphtholphthalein,≥80%(Assaybytitration),Practicalgrade ≥80%(Assaybytitration)
  • Packaging1G
  • Price$89.69
  • Updated2021-12-16
  • Buy
  • ManufacturerCrysdot
  • Product numberCD11097557
  • Product description3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one 95+%
  • Packaging5g
  • Price$69
  • Updated2021-12-16
  • Buy
  • ManufacturerCrysdot
  • Product numberCD11097557
  • Product description3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one 95+%
  • Packaging10g
  • Price$131
  • Updated2021-12-16
  • Buy
  • ManufacturerCrysdot
  • Product numberCD11097557
  • Product description3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one 95+%
  • Packaging25g
  • Price$246
  • Updated2021-12-16
  • Buy
  • ManufacturerSigma-Aldrich
  • Product numberN8257
  • Product descriptionα-Naphtholphthalein practical grade
  • Packaging1g
  • Price$118
  • Updated2024-03-01
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number1.06246
  • Product description1-Naphtholphthalein indicator
  • Packaging1g
  • Price$285
  • Updated2024-03-01
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number1.06246
  • Product description1-Naphtholphthalein indicator
  • Packaging5G
  • Price$326
  • Updated2024-03-01
  • Buy
  • ManufacturerSigma-Aldrich
  • Product numberN8257
  • Product descriptionα-Naphtholphthalein practical grade
  • Packaging5g
  • Price$388
  • Updated2024-03-01
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
AHH MT-19328 1-Naphtholphthalein 85% 25g $628 2021-12-16 Buy
AK Scientific Z3617 alpha-Naphtholphtalein 25g $399 2021-12-16 Buy
Alfa Aesar 041221 alpha-Naphtholphthalein 1g $41.65 2024-03-01 Buy
Alfa Aesar 041221 alpha-Naphtholphthalein 5g $120.65 2024-03-01 Buy
Alfa Aesar 041221 alpha-Naphtholphthalein 25g $405.65 2024-03-01 Buy
Alichem 596010 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one 25g $250.92 2021-12-16 Buy
American Custom Chemicals Corporation CHM0018271 ALPHA-NAPHTHOLPHTHALEIN 95.00% 1G $657.01 2021-12-16 Buy
Chemenu CM140840 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one 95% 25g $230 2021-12-16 Buy
Chem-Impex 42481 α-Naphtholphthalein,≥80%(Assaybytitration),Practicalgrade ≥80%(Assaybytitration) 1G $89.69 2021-12-16 Buy
Crysdot CD11097557 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one 95+% 5g $69 2021-12-16 Buy
Crysdot CD11097557 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one 95+% 10g $131 2021-12-16 Buy
Crysdot CD11097557 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one 95+% 25g $246 2021-12-16 Buy
Sigma-Aldrich N8257 α-Naphtholphthalein practical grade 1g $118 2024-03-01 Buy
Sigma-Aldrich 1.06246 1-Naphtholphthalein indicator 1g $285 2024-03-01 Buy
Sigma-Aldrich 1.06246 1-Naphtholphthalein indicator 5G $326 2024-03-01 Buy
Sigma-Aldrich N8257 α-Naphtholphthalein practical grade 5g $388 2024-03-01 Buy

Properties

Melting point :238-240 °C(lit.)
Boiling point :496.21°C (rough estimate)
Density :1.1532 (rough estimate)
vapor density :14.44 (vs air)
refractive index :1.6400 (estimate)
storage temp. :Store below +30°C.
solubility :Solubility Practically insoluble in water; soluble in ethanol
pka :8.0, 8.2, 8.5(at 25℃)
form :Powder
color :Pink to beige or brown
PH Range :7.1(brownish)-8.3(blue/green)
PH :pH : 7.1～8.7
Odor :Characteristic odour
Water Solubility :Soluble in ethanol. Insoluble in water.
λmax :648nm
Merck :14,6389
BRN :97816
InChIKey :HQHBAGKIEAOSNM-UHFFFAOYSA-N
CAS DataBase Reference :596-01-0(CAS DataBase Reference)

Safety Information

Symbol(GHS): GHS hazard pictograms
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning GHS hazard pictograms P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning GHS hazard pictograms P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning GHS hazard pictograms
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

Description

Indicator in 0.1% or 0.04% alcohol solution.α-Naphtholphthalein is used as a pH indicator and operates in the pH ranges between 7.3 and 8.7. It is also used in the designing of optical carbon dioxide sensor based on fluorescence intensity.

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