12.1.2. CC CHT CH THCalconSolochrom dark blue; Mordant black 17; Natri 2-Hydroxy-1-(2-hydroxy-1-naphthylazo)-naphthalen-4-sulfonatC20H13N2NaO5S = 416,4Dng loi tinh khit ha hc.Bt mu en nu c nh tm. Tan trong nc v ethanol.Trong mi trng kim, to mu ta vi ion calci . Khi khng c mt ion kim loi v d tha mtlng nh trilon B, dung dch c mu xanh lam.Hn hp calconNghin, trn u 0,1 g calcon (TT) vi 9,9 g natri sulfat khan (TT). nhy: Ho tan 0,2 g hn hp calcon (TT) trong 5 ml nc. Ly 1 ml dung dch thu c, thm 50 mlnc , 10 ml dung dch natri hydroxyd 1 N (C) v 1 ml dung dch magnesi sulfat 1% (kl/tt), dung dchc mu xanh lam. Thm 0,1 ml dung dch calci clorid 0,15% (kl/tt), mu chuyn sang ta. Thm 0,1ml dung dch trilon B 0,01 M (C), mu li chuyn sang mu xanh lam.Da cam methylHelianthin; Natri 4-dimethylaminoazobenzen-4-sulfonatC14H14N3NaO3S = 327,3Dng loi tinh khit ha hc.Bt hay tinh th mu vng cam.. D tan trong nc nng, khng tan trong ethanol.Vng chuyn mu: pH 3,0 () n pH 4,4 (vng).Dung dch da cam methyl

Ho tan 0,1 g da cam methyl (TT) trong 80 ml nc, thm ethanol 96% (TT) va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,1 ml dung dch da cam methyl (TT),dung dch c mu vng. Khi thm khng qu 0,1 ml dung dch acid hydrocloric 0,1 N (C), mu phichuyn sang .

Da cam xylenolTetranatri 3,3- (3H - 2, 1 - benzoxathiol - 3 - yliden) bis [(6 - hydroxy - 5 - methyl - 3, 1 - phenylen)methyleneiminobisacetat] S, S - dioxid.C31H28N2Na4O13S = 761,0Dng loi tinh khit ha hc.Bt kt tinh mu nu . D tan trong nc, khng tan trong ethanol.Trong cc dung dch kim, to mu tm vi ion thu ngn, ch, km v mt s ion kim loi khc. Khikhng c mt cc ion kim loi v d trilon B, dung dch c mu vng.

Hn hp da cam xylenolNghin, trn u 1 phn da cam xylenol (TT) vi 99 phn kali nitrat (TT).Th nhy: Thm 50 mg hn hp da cam xylenol (TT) vo hn hp gm 50 ml nc, 1 ml acidacetic 2 M (TT) v 0,05 ml dung dch ch nitrat (TT). Thm va mt lng hexamin (TT) lmchuyn mu t vng sang tm, thm 0,1 ml dung dch trilon B 0,1 M (C), mu chuyn sang vng.Dung dch da cam xylenol (TT)Ha tan 0,1 g da cam xylenol (TT) trong nc va 100 ml v lc nu cn..Diclorofluorescein2,7-Diclorofluorescein; Acid 2-(2,7-Dicloro-6-hydroxy-3-oxo-3H-xanthen-9-yl) benzoicC20H10Cl2O5 = 401,2Dng loi tinh khit ha hc.Bt mu nu vng n cam vng. t tan trong nc, d tan trong ethanol v cc dung dch hydroxyd

2kim long , thc t khng tan trong ether.en eriocrom TMordant black 11; Natri 2- hydroxy-1-[(1-hydroxynaphth-2-yl)azo]-6-nitronaphthalen-4-sulfonatC20H12N3NaO7S = 461,4Dng loi tinh khit ha hc.Bt mu en nu , c nh kim loi . Tan trong nc v ethanol.Trong mi trng kim, to mu vi ion calci, magnesi, km v mt s kim loi khc. Khi khng cmt cc ion kim loi v d tha mt lng nh trilon B, dung dch c mu xanh lam.Dung dch en eriocrom THo tan 0,1 g en eriocrom T (TT) trong ethanol 96 % (TT) va 100 ml.Dung dch ch pha khi dng.Hn hp en eriocrom T (TT)Nghin, trn u 1 phn en eriocrom T (TT) vi 99 phn natri clorid (TT). nhy: Ho tan 0,05 g hn hp en eriocrom T (TT) trong 100 ml nc, dung dch c mu tm nu.Thm 0,3 ml dung dch amoniac 10% (TT), dung dch chuyn thnh mu xanh lam, thm tip 0,1 ml dungdch magnesi sulfat 1%, mu phi chuyn sang tm. congoDinatri (biphenyl-4,4-diyl-bis-2,2-azo)bis(1-aminonaphthalen-4-sulfonat)C32H22N6Na2O6S2 = 697,0Dng loi tinh khit ha hc.Bt mu nu. Tan trong nc.Vng chuyn mu: pH 3,0 (lam) n pH 5,0 (hng).Dung dch congoHo tan 0,1 g congo (TT) trong 20 ml ethanol 96% (TT), thm nc va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,2 ml dung dch congo (TT) v 0,3ml dung dch acid hydrocloric 0,1 N (C), dung dch c mu xanh lam. Khi thm khng qu 0,3 mldung dch natri hydroxyd 0,1 N (C), mu phi chuyn sang hng . cresolo-Cresolsulfonphthalein; 4,4'-(3H-2,1-benzoxathiol-3-yliden) di-o-cresol S,S-dioxydC21H18O5S = 382,4Dng loi tinh khit ha hc.Bt kt tinh mu nu . t tan trong nc, D tan trong ethanol v dung dch natrri hydroxxyd.Vng chuyn mu: pH 7,0 (vng) n pH8,8 ().Dung dch cresol (CT)Ha tan bng cch un nng nh 0,1 g cresol (TT) vi hn hp gm 2,65 ml dung dch natrihydroxyd 0,1 N (TT) v 20 ml ethanol 96% (TT), thm nc va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,1 ml dung dch cresol (TT) v 0,15ml dung dch natri hydroxyd 0,02 N (C), dung dch c mu ta. Khi thm khng qu 0,15 ml dungdch acid hydrocloric 0,02 N (C), mu phi chuyn sang vng.

methylAcid 2-(4-dimethylaminophenylazo)benzoicC15H15N3O2 = 269,3Dng loi tinh khit ha hc.Tinh th mu tm hay bt mu sm . Thc t khng tan trong nc, t an trong ethanol v acid acetic.Vng chuyn mu: pH 4,4 () n pH 6,0 (vng).Dung dch methyl

3Ho tan 50 mg methyl (TT) trong hn hp gm 1,86 ml dung dch natri hydroxyd 0,1 N (TT) v 50ml ethanol 96% (TT), thm nc va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,05 ml dung dch acid hydrocloric0,02 N (C) v 0,1 ml dung dch methyl (TT), dung dch c mu . Khi thm khng qu 0,1 mldung dch natri hydroxyd 0,02 N (C), mu phi chuyn sang vng.

Dung dch hn hp methylHo tan 0,1 g methyl (TT) v 0,05 g xanh methylen (TT) trong ethanol 96% (TT) va 100 ml. phenolPhenolsulfonphthalein; 4,4'-(3H-2,1-Benzoxathiol-3-yliden) diphenol S,S-dioxydC19H14O5S = 354,4Dng loi tinh khit ha hc.Bt mu . Rt k h tan trong nc, kh tan ethanol, d tan trong cc dung dch kim.Vng chuyn mu: pH 6,8 (vng) n pH 8,4 ().Dung dch phenol (TT1)Ho tan 0,1 g phenol (TT) trong hn hp gm 2,82 ml dung dch natri hydroxyd 0,1 N (TT) v 20 mlethanol 96% (TT), thm nc va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,1 ml dung dch phenol (TT), dungdch c mu vng. Khi thm khng qu 0,1 ml dung dch natri hydroxyd 0,02 N (C), mu phi chuynsang tm .

Dung dch phenol (TT2)Dung dch 1: Ho tan 33 mg phenol (TT) trong 1,5 ml dung dch natri hydroxyd 2 M (TT), thm ncva 100 ml.Dung dch 2: Ho tan 25 mg amoni sulfat (TT) trong 235 ml nc, thm 105 ml dung dch natrihydroxyd 2 M (TT) v 135 ml dung dch acid acetic 2 M (TT).Thm 25 ml dung dch 1 vo dung dch 2. Nu cn, iu chnh pH ca hn hp ti 4,7.

ta bromocresol3,3-Dibromo-o-cresolsulfonphthalein; 4,4'-(3H-2,1-Benzoxathiol-3-yliden)bis(6-bromo-o-cresol) S,S-dioxydC21H16Br2O5S = 540,2Dng loi tinh khit ha hc.Bt kt tinh mu hng. Thc t khng tan trong nc, tan trong ethanol v cc dung dch kim long .Vng chuyn mu: pH 5,2 (vng) n pH 6,8 (lam).Dung dch ta bromocresolHo tan 0,05 g ta bromocresol (TT) trong hn hp gm 0,92 ml dung dch natri hydroxyd 0,1 N (TT)v 20 ml ethanol 96% (TT), thm nc va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,2 ml dung dch ta bromocresol(TT) v 0,05 ml dung dch natri hydroxyd 0,02 N (C), dung dch c mu tm xanh. Khi thm khngqu 0,20 ml dung dch acid hydrocloric 0,02 N (TT), mu phi chuyn sang vng. ta cresolm-CresolsulfonphthaleinC21H18O5S = 382,4Dng loi tinh khit ha hc.Bt kt tinh mu lc nu. Kh tan trong nc, tan trong methanol, ethanol v acid acetic bng.Vng chuyn mu: pH 1,2 () n pH 2,8 (vng); pH 7,4 (vng) n pH 9,0 ( ta).Dung dch ta cresolHo tan 0,1 g ta cresol (TT) trong 13 ml dung dch natri hydroxyd 0,01 N (TT), thm nc va 100

4ml.

ta phthaleinMetalphtalein; (1,3-Dihydro-3-oxo-isobenzofuran-1-yliden)bis[(6-hydroxy-5-methyl-3,1-phenylen)bis(methylen eimino)diacetic acid]C32H32N2O12 + ncDng loi tinh khit ha hc.Bt mu trng kem n nu. Thc t khng tan trong nc, tan trong ethanol. nhy: Ho tan 10 mg ta phthalein (TT) trong 1 ml amoniac 13,5 M (TT), pha long thnh 100 mlvi nc . Ly 5 ml dung dch thu c , thm 95 ml nc, 4 ml amoniac 13,5 M (TT), 50 ml ethanol96% (TT) v 0,1 ml dung dch bari clorid 0,1 M (C); dung dch c mu tm lam. Thm 0,15 ml dungdch trilon B 0,1 M (C), dung dch mt mu. trung tnhBasic red 5; 2 - Methyl -3- amino -7- dimethylaminophenazin hydrocloridC15H17ClN4 = 288,8Dng loi tinh khit ha hc.Bt mu nht. t tan trong nc v ethanol.Vng chuyn mu: pH 6,8 () n pH 8,0 (da cam).Dung dch trung tnhHo tan 0,1 g trung tnh (TT) trong ethanol 50% va 100 ml.EosinAcid 87.C20H6Br4Na2O5 = 691,9Dng loi tinh khit ha hc.Bt mu . D t an trong nc, t tan trong ethanol.

Dung dch eosinHa tan 0,5 g eosin (TT) trong nc va 100 ml .Ethoxycrysoidin hydroclorid4-[(4-Ethoxyphenyl]diazenyl]phenylen-1,3-diamin hydrocloridC14H16N4O. HCl = 292,8Dng loi tinh khit ha hc.Bt mu . Tan trong nc v ethanol .Dung dch ethoxycrysoidinHa tan 0,1 g ethoxycrysoidin hydroclorid (TT) trong ethanol 96% (TT) va 100 ml . nhy: Thm 0,05 ml dung dch brom 0,0167 M (TT) vo hn hp gm 0,05 ml dung dchethoxycrysoidin hydroclorid (TT) v 5 ml acid hydrocloric 2 M (TT). Mu ca dung dch chuyn t sang vng nht trong vng 2 pht.

Lc bromocresol3,3,5,5-Tetrabromo-m-cresolsulfonphthalein; 4,4'- (3H-2,1-Benzoxathiol-3-yliden) bis (2,6-dibromo- m-cresol) S,S-dioxydC21H14Br4O5S = 698,0Dng loi tinh khit ha hc.Bt mu trng nu hay vng nht. t tan trong nc, tan trong ethanol v cc dung dch kim long.Vng chuyn mu: pH 3,6 (vng) n pH 5,2 (lam).Dung dch lc bromocresol (TT1)Ho tan 0,05 g lc bromocresol (TT) trong hn hp gm 0,72 ml dung dch natri hydroxyd 0,1 N (TT)v 20 ml ethanol 96% (TT), thm nc va 100 ml.

5 nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,2 ml dung dch lc bromocresol (TT),dung dch c mu xanh lam. Khi thm khng qu 0,2 ml dung dch acid hydrocloric 0,02 N (C), muphi chuyn sang vng.

Dung dch lc bromocresol (TT2)Nghin k 0,2 g lc bromocresol (TT) vi 2,8 ml dung dch natri hydroxyd 0,1 N (TT), pha long thnh200 ml vi nc v lc nu cn.

Dung dch lc bromocresol methyl (Dung dch xanh bromocresol methyl)Hoa tan 0,15 g lc bromocresol (TT) v 0,1 g methyl (TT) trong 180 ml ehanol (TT), pha long vinc thnh 200 ml.

Lc malachitVictoria green; [4-[[4-Dimethylamino)phenyl]phenylmethylen]cyclohexan-2,5-dien-1-yliden] dimethylamoni cloridC23H25ClN2 = 364,9Dng loi tinh khit ha hc.Tinh th mu lc, c nh kim loi. Rt d tan trong nc, tan trong ethanol v methanol.Dung dch 0,001% (kl/tt) trong ethanol 96 % (TT) c hp th cc i 617nm.Dung dch lc malachit 0,5%Ho tan 0,5 g lc malachit (TT) trong acid acetic khan (TT) va 100 ml.MurexidMui monoamoni 5,5-nitrilobis(pirimidin-2,4,6(1H,3H,5H)trion)C8H8N6O6. H2O = 302,20Dng loi tinh khit ha hc.Bt tinh th mu nu . Kh tan trong nc lnh, tan trong nc nng v ethanol. Tan trong cc dungdch kali hydroxyd v natri hydroxyd , cho mu xanh lam.Dung dch murexidHo tan 0,25 g murexid (TT) trong nc va 100 ml.Dung dch ch pha khi dng.Hn hp murexidNghin, trn u 0,25 g murexid (TT) vi 25 g natri clorid (TT).1-Naphtholbenzein-Naphtholbenzein; Phenylbis(4-hydroxynaphthyl)methanolC27H20O3 = 392,5Dng loi tinh khit ha hc.Bt mu nu . Thc t khng tan trong nc, tan trong ethanol v acid acetic bng.

Dung dch 1-naphtholbenzeinHo tan 0,2 g 1-naphtholbenzein (TT) trong 100 ml acid acetic khan (TT). nhy: Ly 50 ml acid acetic khan (TT), thm 0,25 ml dung dch 1-naphtholbenzein (TT), dung dchc mu vng nu. Khi thm khng qu 0,05 ml dung dch acid percloric 0,1 N (C), mu phi chuynsang xanh lc.

O-Phenanthrolin1,10 - Phenanthrolin hydrocloridC12H8N2. HCl. H2O = 234,7Dng loi tinh khit ha hc.Bt trng hoc gn nh trng. D tan trong nc, tan trong ethanol.im chy: Khong 215 OC km phn hu.

6Dung dch feroin sulfatHo tan 0,7 g st (II) sulfat (TT) v 1,76 g O-phenanthrolin (TT) trong 70 ml nc. Thm nc va 100 ml.Phenolphtalein3,3' - Bis (4 - hydroxyphenyl) phthalidC20H14O4 = 318,3Dng loi tinh khit ha hc.Bt mu trng hay trng ng. Thc t khng tan trong nc, tan trong ethanol.Vng chuyn mu: pH 8,2 (khng mu) n pH 10,0 ().Dung dch phenolphtaleinHo tan 0,1 g phenolphtalein (TT) trong 80 ml ethanol 96% (TT) v thm nc va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,1 ml dung dch phenolphtalein (TT),dung dch khng mu. Khi thm khng qu 0,2 ml dung dch natri hydroxyd 0,02 N (C), phi xuthin mu hng.

QuL sc t mu chm chit t cc loi a y nh Rocella, Lecanora v.v....Mnh nh mu lc thm. Tan trong nc v ethanol.Vng chuyn mu: (pH 5,0) n xanh lam (pH 8,0).Giy qu xanhun si 10 phn qu (TT) tn thnh bt th vi 100 phn ethanol 96% (TT) di sinh hn trong 1gi. Gn b phn ethanol. Thm hn hp gm 45 phn ethanol 96% (TT) v 55 phn nc vo cn. yn 2 ngy, gn ly phn dch trong (dch chit A). Tm dch chit A vo cc mnh giy lc, kh. nhy: Nhng mnh giy qu xanh, kch thc 10 mm x 60 mm, vo hn hp gm 100 ml dung dchacid hydrocloric 0,002 N (TT) v 90 ml nc. Lc nh, giy phi chuyn mu sang trong vng 45giy.Giy qu Ly dch chit A trong iu ch Giy qu xanh, thm tng git dung dch acid hydrocloric 2 N (TT) chon khi mu xanh chuyn thnh . Tm dung dch thu c vo cc mnh giy lc, kh. nhy: Nhng mnh giy qu , kch thc 10 mm x 60 mm , vo 100 ml dung dch natri hydroxyd0,002 N (TT). Lc nh, giy phi chuyn mu sang xanh trong vng 45 giy.Dung dch quun si 25 g qu (TT) tn thnh bt th vi 100 ml ethanol 90% d i sinh hn trong 1 gi. Gn bphn dch trong, lp li qu trnh ny 2 ln , mi ln vi 75 ml ethanol 90%. Ho lng qu cchit vo 250 ml nc, lc.St (III) amoni sulfatPhn st amoni; Amoni st (III) sulfatFeNH4(SO4)2. 12H2O = 482,2Dng loi tinh khit phn tch.Tinh th mu trng ti tm nht. D tan trong nc, thc t khng tan trong ethanol.Dung dch st (III) amoni sulfatHo tan 30 g st (III) amoni sulfat (TT) trong 40 ml acid nitric (TT) v thm nc va 100 ml. Nudung dch c th phi lc hoc ly tm.Dung dch st (III) amoni sulfat 10%Ho tan 10 g st (III) amoni sulfat (TT) trong nc va 100 ml.

Thymolphtalein3,3-Bis (4-hydroxy-5-isopropyl-2-methylphenyl) phthalidC28H30O4 = 430,5

7Dng loi tinh khit ha hc.Bt mu trng. Thc t khng tan trong nc, tan trong ethanol v cc dung dch kim long.Vng chuyn mu: khng mu (pH 9,3) n xanh lam (pH 10,5).Dung dch thymolphtaleinHo tan 0,10 g thymolphtalein (TT) trong ethanol 96% (TT) va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,2 ml dung dch thymolphtalein (TT),dung dch khng mu. Khi thm khng qu 0,05 ml dung dch natri hydroxyd 0,1 N (C), phi xuthin mu xanh lam.Tm pyrocatechinPyrocatechinsulfonphthalein; Tm catechol; 4,4'-(3H-2,1-Benzoxanthiol-3-yliden) dipyrocatechol S,S-dioxydC19H14O7S = 386,38Dng loi tinh khit ha hc.Bt kt tinh mu nu vi nh kim loi. D tan trong nc v ethanol.Trong mi trng acid (pH 2 3) to mu xanh lam vi ion bismuth v khi khng c mt ion ny, dungdch c mu vng. Trong mi trng kim to mu lam lc vi ion magnesi v ion km, khi khng cmt cc ion ny, dung dch c mu tm .Dung dch tm pyrocatechinHo tan 0,1 g tm pyrocatechin (TT) trong nc va 100 ml.Tm tinh thGentialviolet ; Hexamethyl-p-rosanilin cloridC25H30ClN3 = 408,0Dng loi tinh khit ha hc.Bt kt tinh hay tinh th mu lc thm, c nh kim loi. Tan trong nc, ethanol v acid acetic khan.Khi dng chun trong mi trng k han, mu chuyn t tm (kim) qua lc lam (trung tnh) n lcvng (acid).Dung dch tm tinh thHo tan 0,50 g tm tinh th (TT) trong acid acetic khan (TT) va 100 ml. nhy: Ly 50 ml acid acetic khan (TT), thm 0,1 ml dung dch tm tinh th (TT), dung dch c mutm. Thm 0,10 ml dung dch acid percloric 0,1 N (C), mu ca hn hp phi chuyn sang lc lam.Tinh btBt rt mn, khng mi, khng v.Dng loi tinh khit.

Dung dch h tinh btNghin 1 g tinh bt (TT) vi 5 ml nc, ri va va khuy vo 100 ml nc s i. un si tip chon khi thu c cht lng ch hi c.Pha trc khi dng. nhy: Ly 5 ml dung dch h tinh bt (TT), pha long thnh 100 ml vi nc, thm 2 git dung dchiod 0,1 N (C), dung dch phi c mu xanh lam.Dung dch h tinh bt c kali iodidHo tan 0,5 g kali iodid (TT) vo 100 ml dung dch h tinh bt (TT) mi pha.Dung dch ny ch dng trong 24 gi.

Giy h tinh bt c iodidTm t giy lc vi dung dch h tinh bt c kali iodid (TT), kh ch ti khng c hi acid. Ctgiy thnh nhng b ng di 50 mm, rng 6 mm. Khi nh 1 git dung dch acid hydrocloric 0,1 N (C)vo bng giy ch th, khng c xut hin mu xanh lam ngay lp tc.

8Bo qun trong l thu tinh mu nu, nt mi. nhy: Trn 0,05 ml dung dch natri nitrit 0,1 M (C) v 4 ml acid hydrocloric (TT), thm nc va 100 ml. Nh 0,05 ml dung dch thu c ln bng giy ch th, phi xut hin mu xanh lam ngay tckhc.

Vng alizarin4-Nitro-4'-oxyazobenzen-3'-natri carboxylatC13H8N3NaO5 = 309,2Dng loi tinh khit ha hc.Bt kt tinh mu nu hay nu vng. t tan trong nc v ethanol.Vng chuyn mu: pH 10,1 (vng) n pH 12,1 (tm hng).Dung dch vng alizarinun cch thu ho tan 0,1 g vng alizarin (TT) tn nh tr ong mt t nc, ngui v thm ncva 100 ml.

Vng metanilNatri 3-[4-(phenylamino) phenylazo] benzensulphonat.C18H14N3NaO3S = 375,4Dng loi tinh khit ha hc.Bt mu vng nu. Tan trong nc v ethanol , rt t tan trong ether.Khi dng chun trong mi trng khan, mu chuyn t vng (kim) sang ta (acid).Dung dch vng metanilHa tan 0,1 g vng metanil (TT) trong methanol (TT) va 100 ml. nhy: Thm 0,1 ml dung dch vng metanil (TT) vo 50 ml acid acetic khan (TT), dung dch c mu hng. Thm 0,05 ml dung dch acid percloric 0,1 M (C), mu chuyn sang tmVng chuyn mu: pH 1,2 () n pH 2,3 (vng cam).Vng titanThiazol yellowDinatri 2,2-[(1-triazen-1,3-diyl)di-4,1-phenylen] bis-[6-methylbenzothiazol-7-sulfonat]C28H19N5Na2O6S4 = 696,0Dng loi tinh khit ha hc.Bt mu nu vng. D tan trong nc v ethanol .

Dung dch vng titanHa tan 0,05 g vng titan (TT) trong nc va 100 ml . nhy: Thm 0,1 ml dung dch vng titan (TT) vo hn hp gm 10 ml nc , 0,2 ml dung dchmagnesi mu 10 phn triu (TT) v 1,0 ml natri hydroxyd 1 M (C). Dung dch c mu hng, thy rkhi so snh vi dung dch i chiu c chun b tng t , nhng khng c dung dch magnesi mu 10phn triu (TT).Giy vng titanTm giy lc bng dung dch vng titan (TT), ri kh nhit phng.Xanh bromophenol3,3-5,5 Tetrabromophenolsulfonphthalein4,4' - (3H-2,1-Benzoxathiol-3-yliden) bis (2,6-Dibromo-phenol) S,S-dioxyd.C19H10Br4O5S = 670,0Dng loi tinh khit ha hc.Bt mu vng cam. Rt kh tan trong nc, kh tan trong ethanol, d tan cc dung dch kim hydroxydlong.

9Vng chuyn mu: pH 2,8 (vng) n pH 4,6 (tm lam).Dung dch xanh bromophenolHo tan 0,1 g xanh bromophenol (TT) trong hn hp gm 1,5 ml dung dch natri hydroxyd 0,1 N (TT)v 20 ml ethanol 96% (TT),, thm nc va 100 ml. nhy: Ly 20 ml nc khng c carbon dioxyd (TT), thm 0,05 ml dung dch xanh bromophenol(TT) v 0,05 ml dung dch acid hydrocloric 0,1 N (C), dung dch c mu vng. Khi thm khng qu0,10 ml dung dch natri hydroxyd 0,1 N (C), mu phi chuyn sang tm lam.Dung dch xanh bromophenol trong ethanol.Ho tan 0,1g xanh bromophenol (TT) trong ethanol 20% va 100 ml.Dung dch xanh bromophenol (TT1).Ho tan 50 mg xanh bromophenol (TT) bng cch un nng nh vi 3,73 ml dung dch natri hydroxyd0,02 N (TT), pha long vi nc va 100 ml.Xanh bromothymol3,3-Dibromothymolsulfonphthalein4,4 - (3H-2,1-Benzoxathiol-3-yliden) bis (2-bromo-thymol) S,S-dioxyd.C27H28Br2O5S = 624Dng loi tinh khit ha hc.Bt kt tinh mu hng hay nu. Thc t khng tan trong nc, tan trong ethanol v cc dung dchkim longVng chuyn mu: pH 6,0 (vng) n pH 7,6 (xanh lam).Dung dch xanh bromothymolHo tan 50 mg xanh bromothymol (TT) trong hn hp gm 4 ml dung dch natri hydroxyd 0,02 N (TT)v 20 ml ethanol 96% (TT), thm nc va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,3 ml dung dch xanh bromothymol(TT), dung dch c mu vng. Khi thm khng qu 0,10 ml dung dch natri hydroxyd 0,02 N (C), muphi chuyn sang xanh lam.

Xanh thymolThymolsulfonphthalein4,4'-(3H-2,1-Benzoxathiol-3-yliden) dithymol S,S-dioxydC27H30O5S = 466,6Dng loi tinh khit ha hc.Bt kt tinh mu lam lc n lc nu. Kh tan trong nc, tan trong ethanolv cc dung dch kim long.Vng chuyn mu: pH 1,2 () n pH 2,8 (vng); pH 8,0 (lc nu) n pH 9,6 (lam).Dung dch xanh thymolHo tan 0,1 g xanh thymol (TT) trong hn hp gm 2,15 ml dung dch natri hydroxyd 0,1 N (TT) v 20ml ethanol 96% (TT), thm nc va 100 ml. nhy: Ly 100 ml nc khng c carbon dioxyd (TT), thm 0,1 ml dung dch xanh thymol (TT) v0,2 ml dung dch natri hydroxyd 0,02 N (C), dung dch c mu xanh lam. Khi thm khng qu 0,1 mldung dch acid hydrocloric 0,02 N (C), phi chuyn sang vng.

Dung dch xanh thymol trong dimethylformamidHo tan 1 g xanh thymol (TT) trong dimethylformamid (TT) va 100 ml.Dung dch xanh thymol trong methanolHo tan 0,3 g xanh thymol (TT) trong methanol (TT) va 100 ml. Lc, nu cn.

10

Khong pH v mu chuyn ca cc cht ch th

Ch th Khong pH Mu chuyn cresol 0,2 1,8

7,0 8,8 - VngVng

Xanh thymol 1,2 2,8 - VngTropeolin 00 1,3 3,2 - VngDa cam methyl 3,0 4,4 - VngXanh bromophenol 2,8 4,6 Vng Tm lam congo 3,0 5,0 Lam HngLc bromocresol 3,6 5,2 Vng - Lam methyl 4,4 6,0 - Vng ta bromocresol 5,2 6,8 Vng Tm lamXanh bromothymol 6,0 7,6 Vng - Lam trung tnh 6,8 8,0 - Da cam phenol 6,8 8,4 Vng Tm Xanh thymol 8,0 9,6 Lc nu - LamPhenolphtalein 8,2 10,0 Khng mu Thymolphtalein 9,3 10,5 Khng mu - LamVng alizarin 10,1 12,1 Vng Tm hng