Description

Phenol, p-(Methylamino)-, Sulfate (1:1) (Salt) CAS NO 51-72-9 is an important organic salt, specifically the sulfate salt of 4-(methylamino)phenol. This compound serves as a key chemical intermediate and functional component in several high-value industrial synthesis processes. It is primarily sought by manufacturers in the pharmaceutical, photographic chemical, and specialty dye industries for its reactive amino-phenol structure. Consistent quality and reliable supply of this intermediate are critical for ensuring the efficiency and purity of downstream products.

Application

• Pharmaceutical Intermediate: Used in the synthesis of various active pharmaceutical ingredients (APIs) and fine chemicals, particularly those requiring a substituted aminophenol moiety.
• Photographic Developer Component: Acts as a key constituent in certain black-and-white photographic developing agents, where it contributes to image formation.
• Dye and Pigment Synthesis: Serves as a precursor in the manufacturing of specialized azo dyes and organic pigments, leveraging its aromatic amine and phenol functional groups.
• Chemical Research & Development: Employed as a building block in organic synthesis for creating novel compounds in academic and industrial R&D settings.
• Polymer Modification: Can be used to introduce functional groups into polymer chains for creating specialty resins with enhanced properties.
• Analytical Reagent: Utilized in specific analytical chemistry applications and as a standard for calibration purposes.

Basic Information

Item	Detail
Product Name	Phenol, p-(Methylamino)-, Sulfate (1:1) (Salt)
CAS No.	51-72-9
Molecular Formula	C7H9NO · H2SO4 or C7H11NO5S
Molecular Weight	221.23 g/mol
Synonyms	4-(Methylamino)phenol Sulfate; Metol Sulfate; p-Methylaminophenol Sulfate; Elon Sulfate; Photographic Metol; N-Methyl-4-aminophenol Sulfate; 4-Hydroxy-N-methylaniline Sulfate; p-(Methylamino)phenol Hemisulfate
EINECS	200-103-6

Quality Control

Our production of Phenol, p-(Methylamino)-, Sulfate (1:1) (Salt) adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including assay, impurity profiling, and physical characterization, to ensure it meets precise customer specifications and industry standards. A Certificate of Analysis (COA) documenting purity, identity, and other critical parameters is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed after opening to minimize exposure to atmospheric moisture and light, which can affect product stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition (Sulfated Ash)	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.