2naphthol’s
[too-naf-thawl, -thol, -nap-] /ˈtuˈnæf θɔl, -θɒl, -ˈnæp-/
noun, chemistry
beta-naphthol.
see under naphthol.
naphthol
[naf-thawl, -thol, nap-] /ˈnæf θɔl, -θɒl, ˈnæp-/
noun, chemistry
either of two isomeric hydroxyl derivatives, c 1 0 h 7 oh, of naphthalene (alpha-naphthol or 1-naphthol and beta-naphthol or 2-naphthol) white or yellowish crystals, with a phenolic odor, that darken on exposure to light: used chiefly in dyes, drugs, perfumes, and insecticides.
also called hydroxynaphthalene.
naphthol
/ˈnæfθɒl; ˈnæp-/
noun
a white crystalline solid having two isomeric forms, alpha-naphthol, used in dyes, and beta-naphthol, used in dyes and as an antioxidant. formula: c10h7oh
word origin
c19: from naphtha + -ol1
naphthol naph·thol (nāf’thôl’, -thōl’, nāp’-) or naph·tol (-tôl, -tōl)
n.
an organic compound occurring in two isomeric forms, alpha-naphthol and beta-naphthol. also called naphthalenol.
naphthol
(nāf’thôl’, -thōl’, nāp’-)
a poisonous organic compound occurring in two isomeric forms. both isomers are important in the manufacture of dyes, and also in making antiseptics, insecticides, and tanning agents. naphthol consists of a hydroxyl group (oh) attached to naphthalene. chemical formula: c10h8o.
naphthol
either of two colourless, crystalline organic compounds derived from naphthalene and belonging to the phenol family; each has the molecular formula c10h7oh. both compounds have long been identified with the manufacture of dyes and dye intermediates; they also have important uses in other areas of the chemical industry.
learn more about naphthol with a free trial on britannica.com
Read Also:
- 2nd baron culpeper of thoresway
[kuhl-pep-er] /ˈkʌlˌpɛp ər/ noun thomas (2nd baron culpeper of th-r-sway) 1635–89, english colonial governor of virginia 1680–83. culpeper /ˈkʌlpɛpə/ noun nicholas. 1616–54, english herbalist and astrologer; his unauthorized translation (1649) of the college of physicians’ pharmacopoeia and his herbal (1653) popularized herbalism
- 2nd baron culpeper thoresway
[kuhl-pep-er] /ˈkʌlˌpɛp ər/ noun thomas (2nd baron culpeper of th-r-sway) 1635–89, english colonial governor of virginia 1680–83. culpeper /ˈkʌlpɛpə/ noun nicholas. 1616–54, english herbalist and astrologer; his unauthorized translation (1649) of the college of physicians’ pharmacopoeia and his herbal (1653) popularized herbalism
- 2nd duc de francois de lorraine
[geez] /giz/ noun françois de lorraine [frahn-swa duh law-ren] /frɑ̃ˈswa də lɔˈrɛn/ (show ipa), 2nd duc de, 1519–63, french general and statesman. his son, henri i de lorraine [ahn-ree] /ɑ̃ˈri/ (show ipa), duc de, 1550–88, french general and leader of opposition to the huguenots. guise /ɡaɪz/ noun semblance or pretence: under the guise of friendship […]
- 2nd duc de francois de lorraine guise
[geez] /giz/ noun françois de lorraine [frahn-swa duh law-ren] /frɑ̃ˈswa də lɔˈrɛn/ (show ipa), 2nd duc de, 1519–63, french general and statesman. his son, henri i de lorraine [ahn-ree] /ɑ̃ˈri/ (show ipa), duc de, 1550–88, french general and leader of opposition to the huguenots. guise /ɡaɪz/ noun semblance or pretence: under the guise of friendship […]
- 2nd duc de guise
[geez] /giz/ noun françois de lorraine [frahn-swa duh law-ren] /frɑ̃ˈswa də lɔˈrɛn/ (show ipa), 2nd duc de, 1519–63, french general and statesman. his son, henri i de lorraine [ahn-ree] /ɑ̃ˈri/ (show ipa), duc de, 1550–88, french general and leader of opposition to the huguenots. guise /ɡaɪz/ noun semblance or pretence: under the guise of friendship […]