Thermo Scientific Chemicals Methyl Orange, ACS

Catalog No.	Quantity
AA1787414	25 g
AA1787406	5 g
AA1787422	100 g

Catalog No. AA1787414 Supplier Thermo Scientific Chemicals Supplier No. 01787414

Description

CAS: 547-58-0 | C14H14N3NaO3S | 327.334 g/mol

Methyl orange is a pH indicator frequently used in titrations, also used for histological microscopy.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Specifications

Chemical Identifiers

• CAS: 547-58-0
• Molecular Formula: C14H14N3NaO3S
• Molecular Weight (g/mol): 327.334
• MDL Number: MFCD00007502
• InChI Key: STZCRXQWRGQSJD-UHFFFAOYSA-M
• Synonym: Acid Orange 52; C.I. 13025
• PubChem CID: 23673835
• IUPAC Name: sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate
• SMILES: CN(C)C1=CC=C(C=C1)N=NC2=CC=C(C=C2)S(=O)(=O)[O-].[Na+]

• Melting Point: >300°C
• UN Number: UN3143
• Beilstein: 4732884
• Merck Index: 14,6105
• Solubility Information: Soluble in 500 parts water; More soluble in hot water
• Formula Weight: 327.34
• Grade: ACS
• Odor: Weak, characteristic
• Color: Orange
• pH: 6.5
• Quantity: 25 g
• Physical Form: Crystalline
• Chemical Name or Material: Methyl Orange

Safety and Handling

Hazard Category	H301
Hazard Statement	GHS H Statement H301 Toxic if swallowed.
Precautionary Statement	P264b-P270-P301+P310-P330-P501c
DOTInformation	Transport Hazard Class: 6.1; Packing Group: III; Proper Shipping Name: DYES, SOLID, TOXIC, N.O.S.
EINECSNumber	208-925-3
RTECSNumber	DB6327000
TSCA	Yes
Recommended Storage	Ambient temperatures

SDS

RUO – Research Use Only