. Metil biru (6:381)Nama resmi : Methilthionin chloridumNama lain : Metil biru, Basic 

blueRM/BM : C16H18

CIN3

S.H2

O / 372,90Pemerian : Serbuk mengkilap, seperti logam atau suramkehijauan tua atau serbuk warna coklat,hampir tidak berbau, higrosk

TROPAEOLIN OOOther Names

Benzenesulfonic acid, p-(p-anilinophenylazo)-, sodium salt; C.I. Acid Orange 5; C.I.Acid Orange 5, monosodium salt; Acid Orange 5; Acid Orange IV; Acid Yellow D; Aniline Yellow;C.I. 13080;

Diphenylamine Orange; Hispacid Orange IV; Orange GS; Orange IV; Orange N; SolarOrange IV; Tertracid Orange IV; Tropaeolin OO; Tropeolin OO

CA Index NameBenzenesulfonic acid, 4-[[4-(phenylamino)phenyl]azo]-, monosodium salt

CAS Registry Number554-73-4

Merck Index Number9776

Chemical Structure

NaO3S N=N NH

Chemical/Dye ClassAzo

Molecular FormulaC18H14N3O3SNaMolecular Weight

375.38pH Range

1.4–2.6Color Change at pH

Red (1.4) to yellow (2.6)pKa2.0

Physical FormOrange-yellow powder

SolubilitySoluble in water, ethanolUV-Visible (λ max)

527 nmMelting Point

>300°CSynthesis

Synthetic methods

Major ApplicationsSensors, lithographic plates, optical recording media, photoreceptor, inks, indication system for product exceeding threshold temperature, lubricants, textiles, food storage, determination of

amiodarone, astemizole, bromhexine, clomipramine, deutiforin, domperidone, uoroquinolone, roxithromycin, terfenadine, thiabendazole, antihistamines

 Safety/Toxicity

Biodegradation and toxicity