1-Nitroso-2-naphthol-3,6-disulfonic acid, disodium salt hydrate,

Thermo Scientific™ 1-Nitroso-2-naphthol-3,6-disulfonic Acid Disodium Salt Hydrate – Pure Indicator Grade

This compound serves as a sensitive reagent for the determination of trace metals, particularly cobalt, in analytical chemistry applications.

Product Details:

• Chemical Name: 1-Nitroso-2-naphthol-3,6-disulfonic acid disodium salt hydrate

• Synonyms: Nitroso-R salt, Disodium 3-hydroxy-4-nitrosonaphthalene-2,7-disulfonate

• CAS Number: 525-05-3

• Molecular Formula: C₁₀H₅NNa₂O₈S₂

• Molecular Weight: 377.25 g/mol

• Physical Form: Yellow to orange crystalline powder

• Grade: Pure, indicator grade

• Packaging: Glass bottle

Key Features:

• Highly sensitive for trace metal detection, especially cobalt

• Slightly soluble in water

• Stable under recommended storage conditions

Chemical Information:

• Melting Point:

  300°C

• Loss on Drying: ≤5% (1 g, 105°C)

• Infrared Spectrum: Authentic

Safety and Handling:

• Hazard Statements:

  • H302: Harmful if swallowed

  • H312: Harmful in contact with skin

  • H315: Causes skin irritation

  • H319: Causes serious eye irritation

  • H332: Harmful if inhaled

  • H335: May cause respiratory irritation

• Precautionary Statements:

  • P261: Avoid breathing dust/fume/gas/mist/vapours/spray

  • P280: Wear protective gloves/protective clothing/eye protection/face protection

  • P301+P312: IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell

  • P302+P352: IF ON SKIN: Wash with plenty of water

  • P304+P340: IF INHALED: Remove person to fresh air and keep comfortable for breathing

  • P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing

Handle with appropriate personal protective equipment and store in a cool, dry place away from oxidizing agents.