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VI 
CAS:596-01-0
Molecular Formula:C28H18O4
Molecular Weight:418.44
EINECS:209-875-5
Synonyms:3,3-bis(4-hydroxynaphthalen-1-yl)-1,3-dihydro-2-benzofuran-1-one; alpha-Naphtholphthalein, indicator, pure 5GR; 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one; 1-NAPHTHOLPHTHALEIN INDICATOR PH 7,1 – 8; 1-NAPHTHOLPHTHALEIN
What is alpha-Naphtholphthalein CAS 596-01-0？
The impurities in alpha Nathophthalein are mostly light red in color, which changes from light red to blue-green at pH 7.3-8.7.
Specificatie
| Item | Specificatie |
| Boiling point | 496.21°C (rough estimate) |
| Dichtheid | 1.1532 (rough estimate) |
| Smeltpunt | 238-240 °C(lit.) |
| pKa | 8.0, 8.2, 8.5(at 25℃) |
| weerstand | 1.6400 (estimate) |
| Opslag omstandigheden | Store below +30°C. |
Toepassing
Alpha Nephthophyllein is used as an acid-base indicator. It is colorless to orange yellow at a pH of around 6.7 and changes from orange yellow to blue at a pH of around 7.9. Impurities in commercially available products often appear as a light red color, which changes from light red to blue-green at a pH of 7.3-8.7.
Verpakking
Meestal verpakt in 25kg/trommel,en kan ook worden aangepast pakket.
Synoniemen
3,3-bis(4-hydroxynaphthalen-1-yl)-1,3-dihydro-2-benzofuran-1-one; alpha-Naphtholphthalein, indicator, pure 5GR; 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one; 1-NAPHTHOLPHTHALEIN INDICATOR PH 7,1 – 8
