See also:

• RESORCIN (meta-dioxybenzene), C5H4(OH)2i one of the dihydric phenols. It is obtained on fusing many resins (galbanum, asafoetida, &c.)

RESORCIN (See also:

• META

meta-dioxybenzene), See also:

• C5H4

C5H4(OH)2i one of the dihydric phenols. It is obtained on fusing many resins (See also:

• GALBANUM (Heb. Helben¢h; Gr. xaXfiavrl)

galbanum, asafoetida, &c.)  with See also:

• CAUSTIC (Gr. rcavvraubs, burning)

caustic potash, or by the See also:

• DISTILLATION (from the Lat. distillare, more correctly destillare, to drop or trickle down)

distillation of See also:

• BRAZIL
• BRAZIL, or BRASIL

Brazil-See also:

• WOOD, ANTHONY A2 (1632-1695)
• WOOD, JOHN GEORGE (1827—1889)
• WOOD, MRS HENRY [ELLEN] (1814—1887)
• WOOD, SEARLES VALENTINE (1798—188o)

wood See also:

• EXTRACT (from Lat. extrahere, to draw out)

extract . It may be prepared synthetically by fusing See also:

• META

meta-iodophenol, phenol meta-sulphonic See also:

• ACID (from the Lat. root ac-, sharp; acere, to be sour)

acid, and See also:

• BENZENE, C6H6

benzene meta-disulphonic acid with potash; by the See also:

• ACTION

action of nitrous acid on meta-aminophenol; or by the action of 1o% hydrochloric acid on meta-phenylene diamine (J . See also:

• MEYER, CHRISTIAN ERICH HERMANN VON (18or-1869)
• MEYER, HEINRICH AUGUST WILHELM (1800-1873)
• MEYER, JULIUS LOTHAR (183o-1895)
• MEYER, KONRAD FERDINAND (1825-1898)
• MEYER, VICTOR (1848-1897)
• MEYER, [MARIE] PAUL HYACINTHE (184o- )

Meyer, Ber., 1897, 30, p . 2569) . Many ortho and See also:

• PARA
• PARA (officially BELEM; sometimes BELEM DO PARA)

para-compounds of the aromatic See also:

• SERIES (a Latin word from serere, to join)

series (for example, the brom-phenols, benzene para-disulphonic acid) also yield See also:

• RESORCIN (meta-dioxybenzene), C5H4(OH)2i one of the dihydric phenols. It is obtained on fusing many resins (galbanum, asafoetida, &c.)

resorcin on See also:

• FUSION

fusion with caustic potash . It crystallizes from benzene in colourless needles which melt at 119° C. and See also:

• BOIL

boil at 276.5° C . (L . See also:

• CALDERON, RODRIGO (d. 1621), COUNT OF OLIVA AND MARQUES DE LAS SIETE IGLESIAS

Calderon), or 280° C . (C . Graebe), and is readily soluble in See also:

• WATER

water, See also:

• ALCOHOL

alcohol and See also:

• ETHER, (C2H5)2O

ether, but insoluble in See also:

• CHLOROFORM (trichlor-methane), CHC13

chloroform and See also:

• CARBON (symbol C, atomic weight 12)

carbon bisulphide . It reduces See also:

• FEHLING, HERMANN VON (1812—1885)

Fehling's See also:

• SOLUTION (from Lat. solvere, to loosen, dissolve)

solution, and ammoniacal See also:

• SILVER

silver solutions . It does not See also:

• FORM (Lat. forma)

form a precipitate with See also:

• LEAD
• LEAD (pronounced iced)

lead acetate solution, as the isomeric See also:

• PYROCATECHIN, or PYROCATECHOL

pyrocatechin does .

Ferric chloride See also:

• COLOURS, MILITARY

colours its aqueous solution a dark See also:

• VIOLET

violet, and See also:

• BROMINE (symbol Br, atomic weight 79-96)

bromine water precipitates tribromresorcin . See also:

• SODIUM [symbol Na, from Lat. natrium; atomic weight 23.00 (0=16)]

Sodium See also:

• AMALGAM

amalgam reduces it to dihydroresorcin, which when heated to 150-16o° C. with concentrated baryta solution gives y-acetylbutyric acid (D . Vorlander); when fused with caustic potash, resorcin yields phloroglucin, pyrocatechin and diresorcin . It condenses with acids or acid chlorides, in the presence of dehydrating agents, to oxyketones, e.g. with See also:

• ZINC

zinc chloride and glacial acetic acid at 145° C. it yields resacetophenone (HO)2C6H3•CO.See also:

• CH3

CH3 (M . Nencki and N . Sieber, Jour. prak . Chem., 1881 [2], 23, p . 147) . With the anhydrides of dibasic acids it yields fluoresceins (q.v.) . When heated with See also:

• CALCIUM [symbol Ca, atomic weight 40.0 (o= x6)]

calcium chloride-See also:

• AMMONIA (NH3)

ammonia to 200° C. it yields meta-dioxydiphenylamine (A . Seyewitz, See also:

• BULL
• BULL, GEORGE (1634–1710)
• BULL, JOHN (c. 1562–1628)
• BULL, OLE BORNEMANN (18ro-188o)

Bull . See also:

• SOC

Soc .

Chins., 1890 [3], 3, p . 811) . With sodium nitrite it forms a water-soluble See also:

• BLUE (common in different forms to most European languages)

blue dye, which is turned red by acids, and is used as an See also:

• INDICATOR (from Lat. indicare, to point out)

indicator, under the name of lacmoid (M . C . Traub and C . Hock, Ber., 1884, 17, p . 2615) . It condenses readily with See also:

• ALDEHYDES

aldehydes, yielding with formaldehyde, on the addition of_ a little hydrochloric acid, methylene diresorcin [(HO)2•C6H3]2•See also:

• CH2
• CH2(OH)

CH2, whilst with See also:

• CHLORAL

chloral See also:

• HYDRATE

hydrate, in the presence of See also:

• POTASSIUM [symbol K (from kalium), atomic weight 39.114 0=16)]

potassium bisulphate, it yields the lactone of tetra-oxydiphenyl methane carboxylic acid (J . T . See also:

• HEWITT, ABRAM STEVENS (1822-1903)

Hewitt and F . G . See also:

• POPE (Gr. irarraas, post-classical Lat. papa, father)
• POPE, ALEXANDER (1688–1744)
• POPE, ALEXANDER (1763-1835)
• POPE, JANE (1742-1818)
• POPE, JOHN (1822-1892)
• POPE, SIR THOMAS (c. 1507-1559)

Pope, Jour .

Chem . Soc., 1897, 71, p . 1084) . In alcoholic solution it condenses with sodium acetoacetate to form 13-methylumbelliferone, C50H803 (A . See also:

• MICHAEL
• MICHAEL (1596-1645)
• MICHAEL (Hebrew Sn,q, " Who is like God? ")

Michael, Jour. prak . Chem., 1888 [2], 37, 470) . With concentrated nitric acid, in the presence of See also:

• COLD (in O. Eng. cald and ceald, a word coming ultimately from a root cognate with the Lat. gelu, gelidus, and common in the Teutonic languages, which usually have two distinct forms for the substantive and the adjective, cf. Ger. Kolte, kalt, Dutch koude

cold concentrated sulphuric acid, it yields trinitro-resorcin (styphnic acid), which forms yellow crystals, exploding violently on rapid See also:

• HEATING

heating . In See also:

• MEDICINE

medicine, resorcin, which is See also:

• OFFICIAL (Late Lat. QJicialis, for class. Lat. apparitor, from officium, office, duty)

official in the See also:

• UNITED

United States under the name of resorcinol, was formerly used as an See also:

• ANTI, or CAMPA

anti-pyretic, but it has been given up . The dose is 2 to 8 grs . Used externally it is an antiseptic and disinfectant, and is used 5 to 10 % in ointments in the treatment of chronic skin diseases such as See also:

• PSORIASIS

psoriasis and See also:

• ECZEMA (Gr. EKE a, a cutaneous eruption)

eczema of a sub-acute See also:

• CHARACTER (Gr. xapareri7p, from xap&crew, to scratch)

character . Weak, watery solutions of resorcin (10 or 15 grs. to the See also:

• OUNCE

ounce) are useful in allaying the itching in erythematous eczema . A 2% solution used as a spray has been used with marked effect in See also:

• HAY
• HAY (a word common in various forms to Teutonic languages; cf. Ger. Heu, Dutch hooi; the root from which it is derived, meaning " to cut," is also seen in " to hew "; cf. " hoe ")
• HAY, GEORGE (1729—1811)
• HAY, GILBERT
• HAY, JOHN (1838–1905)

hay See also:

• FEVER (Lat. febris, connected with fervere, to burn)

fever and in whooping-cough .

In the latter disease to minims of the 2% solution has been given internally . It has also been employed in the treatment of gastric See also:

• ULCER

ulcer in doses of 2 to 4 grs. in pill, and is said to be analgesic and haemostatic in its action . In large doses it is a See also:

• POISON

poison causing giddiness, deafness, salivation, sweating and See also:

• CONVULSIONS

convulsions . It is also worked up in certain medicated soaps . Mono-acetyl resorcin, CBH4(OH)•O•COCH3, is used under the name of " euresol." Resazurin, C12H7NO4, obtained by the action of nitrous acid on resorcin (P . Weselsky and R . Benedikt, Monats., 188o, 1, p . 889), forms small dark red crystals 'possessing a greenish metallic glance . When dissolved in concentrated sulphuric acid and warmed to 21o° C., the solution on pouring into water yields a precipitate of resorufin, C12H,NO3, an oxyphenoxazone, which is Insoluble in water, but is readily soluble in hot concentrated hydrochloric acid, and in solutions of caustic alkalis . The .alkaline solutions are of a See also:

• ROSE
• ROSE (Rosa)
• ROSE, GEORGE (1744-1818)
• ROSE, HUGH JAMES (1795—1838)
• ROSE, WILLIAM STEWART (1775-1843)

rose-red See also:

• COLOUR (Lat. color, connected with celare, to hide, the root meaning, therefore, being that of a covering)

colour and show a See also:

• CINNABAR (Ger. Zinnober)

cinnabar-red See also:

• FLUORESCENCE

fluorescence . A tetrabromresorufin is used as a dye-stuff under the name of Fluorescent Resorcin Blue . Thioresorcin is obtained by the action of. zinc and hydrochloric acid on the chloride of benzene meta-disulphonic acid .

It melts at 27° C. and boils at 2430 C . Resorcin disulphonic Acid (HO)2C6H2(HSO0)2, is a deliquescent See also:

• MASS (O.E. maesse; Fr. messe; Ger. Messe; Ital. messa; from eccl. Lat. missa)
• MASS, IN

mass obtained by the action of sulphuric acid on resorcin (H . See also:

• FISCHER
• FISCHER, EMIL (1852– )
• FISCHER, ERNST KUNO BERTHOLD (1824–1907)

Fischer, Monats., 1881, 2, p . 321) . It is easily soluble in water and decomposes when heated to too' C .