If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
1.06076
Methyl red (C.I. 13020)
pH indicator, ACS, Reag. Ph Eur
Synonyme(s) :
Methyl red (C.I. 13020), 4-Dimethylaminoazobenzene-2′-carboxylic acid
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A propos de cet article
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Nom du produit
Methyl red (C.I. 13020), indicator ACS,Reag. Ph Eur
Qualité
ACS reagent
Niveau de qualité
Agence
reag. Ph. Eur.
suitable for SM 4500 - NH3
Forme
powder
solid
Perte
≤5% loss on drying, 110°C
Couleur
red to red-violet
visual transition interval
4.4-6.0, red to yellow
Pf
178-182 °C
Masse volumique apparente
300‑500 kg/m3
Amax
427-437 nm (buffer pH 6.2)
523-526 nm (buffer pH 4.5)
Température de stockage
2-30°C
Chaîne SMILES
N(C)(C)c1ccc(cc1)N=Nc2c(cccc2)C(=O)O
InChI
1S/C15H15N3O2/c1-18(2)12-9-7-11(8-10-12)16-17-14-6-4-3-5-13(14)15(19)20/h3-10H,1-2H3,(H,19,20)
Clé InChI
CEQFOVLGLXCDCX-UHFFFAOYSA-N
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Cet article | 250198 | 08714 | 1.06078 |
|---|---|---|---|
| grade ACS reagent | grade ACS reagent | grade - | grade ACS reagent |
| agency reag. Ph. Eur. | agency - | agency according to GB 4789.30-2016, according to ISO 22964:2017 | agency - |
| form powder | form crystalline | form - | form solid |
| loss ≤5% loss on drying, 110°C | loss - | loss - | loss ≤5% loss on drying, 110°C |
| color red to red-violet | color - | color - | color - |
| visual transition interval 4.4-6.0, red to yellow | visual transition interval 4.2-6.2, pink to yellow | visual transition interval - | visual transition interval - |
Remarque sur l'analyse
Appearance: Red to red-violet powder, eventually with granular parts.
Clarity of solution (1 g/l; ethanol): passes test
Melting point (capillary method, temperatur measerment in the heating block): 179 - 182 °C
Transition range: pH 4.4 - pH 6.0 Red - yellow
Absorption maximum (buffer pH 4.5): 523 - 526 nm
Absorption maximum (buffer pH 6.2): 427 - 437 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; buffer pH 4.5; calculated on anhydrous substance): 1350 - 1500
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; buffer pH 6.2; calculated on anhydrous substance): 700 - 800
Transition range (according to ACS): passes test
Loss on drying (110 °C): ≤ 5 %
Code de la classe de stockage
11 - Combustible Solids
Classe de danger pour l'eau (WGK)
WGK 2
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Certificats d'analyse (COA)
Recherchez un Certificats d'analyse (COA) en saisissant le numéro de lot du produit. Les numéros de lot figurent sur l'étiquette du produit après les mots "Lot" ou "Batch".
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Contenu apparenté
This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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