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| | METANIL YELLOW Basic information |
| | METANIL YELLOW Chemical Properties |
| Melting point | >250°C | | Boiling point | 325℃[at 101 325 Pa] | | density | 0.488[at 20℃] | | vapor pressure | 0Pa at 25℃ | | storage temp. | room temp | | solubility | 25g/l | | form | Powder | | Colour Index | 13065 | | color | Orange | | PH | 10 (10g/l, H2O, 20℃) | | PH Range | Red (1.2) to yellow (2.3) | | Water Solubility | Soluble in water (25g/L). | | λmax | 414nm, 435nm | | Merck | 14,5928 | | BRN | 3831568 | | Major Application | Display device, nanoparticles, optical sensors, batteries, lithographic printing plates, inks, highlighters, children’s coloring books, floor coatings, disinfectants, dyes, personal care products, cosmetics, food storage, antiseptic, dental impressionmaterials | | LogP | 0.137 at 25℃ | | CAS DataBase Reference | 587-98-4(CAS DataBase Reference) | | EPA Substance Registry System | C.I. Acid Yellow 36, monosodium salt (587-98-4) |
| Hazard Codes | Xi | | Risk Statements | 43-36/37/38 | | Safety Statements | 22-24/25-36/37-36-26 | | WGK Germany | 2 | | RTECS | DB7329500 | | TSCA | Yes | | HS Code | 32041200 | | Toxicity | LD50 orally in Rabbit: > 2000 mg/kg LD50 dermal Rat > 2000 mg/kg |
| | METANIL YELLOW Usage And Synthesis |
| Description | Metanil yellow is a yellow monoazo dye. This coloring
agent is used in leather and wood stains, and was also
employed as a food dye in India.
| | Chemical Properties | orange powder | | Uses | As indicator in 0.1% solution, of which 2 drops are required for 10 ml liquid. pH: 1.2 red to 2.3 yellow. | | Uses | Metanil Yellow is used as indicator. Metanil yellow is useful in spectrophotometric methods to determine the presence of trace amounts of nitrates and nitrites in solution. The method utilizes the fact that potassium bromate can catalyze the discoloring of Metanil yellow which can then be analyzed by spectrophotometry. | | Uses | dye used in leather; as indicator (pH) in laboratories | | Definition | ChEBI: An organic sodium salt having 3-[(4-anilinophenyl)diazenyl]benzene-1-sulfonate as the counterion. Used in one variant of Masson's trichrome to stain collagen yellow in contrast to the red muscle, but is not in common used. | | General Description | Metanil yellow is an azo dye, which is used as a counterstain in PAS (periodic acid-Schiff) or iron-hematoxylin stained sections to increase contrast. At pH 1.2, metanil yellow is red in color, whereas in pH 2.3, it is yellow in color. | | Flammability and Explosibility | Notclassified | | Biochem/physiol Actions | Metanil yellow is an azo dye. It is used as a counterstain in PAS (periodic acid-Schiff)/iron-hematoxylin stained sections to increase contrast. Metanil yellow changes its color from red at pH 1.2 to yellow at pH 2.3. | | Contact allergens | Metanil yellow is a yellow monoazoic dye. This color ing agent is used in leather and wood stains, and is also employed as a food dye in India. | | Safety Profile | Moderately toxic by
intraperitoneal route. Experimental
reproductive effects. Human mutation data
reported. When heated to decomposition it
emits toxic fumes of SOx, NOx, and NazO.
See also AROMATIC AMINES and
SULFONATES. | | Properties and Applications |
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Standard
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Light Fastness
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Soaping
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Persperation Fastness
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Oxygen bleaching
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Fastness to seawater
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Fading
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Stain
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Fading
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Stain
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Fading
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Stain
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ISO
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3
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2
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2-3
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AATCC
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3
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1
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4
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5
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1
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| | Purification Methods | It can be salted out from water three times with sodium acetate, then repeatedly extracted with EtOH [McGrew & Schneider J Am Chem Soc 72 2547 1950]. [Beilstein 16 II 168.] |
| | METANIL YELLOW Preparation Products And Raw materials |
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