Silver Stearate for Photographic Materials, CAS 3507-99-1

Silver stearate C18H35AgO2, silver salt of stearic acid for photographic materials, CAS 3507-99-1

Substance Identification

CAS 3507-99-1 corresponds to silver stearate, or silver octadecanoate, with formula C18H35AgO2. The calculated Ag fraction of about 27.57% is consistent with the requirement of not less than 25%. The designation «for photographic materials» describes the intended use of the grade but does not replace the quality certificate.

Confirmed Characteristics

• CAS: 3507-99-1
• Formula: C18H35AgO2
• Molar mass: about 391.26 g/mol
• Silver: not less than 25% per TU 6-09-20-119-87
• Item number: 5162758

Applications and Preparation

Silver salts of long-chain carboxylic acids are used in special photochemical compositions and research materials. The result depends on particle size, free acid, moisture, and impurities of other silver salts.

Before preparing the composition, check the Ag content, acid number or free stearic acid, particle size, and light history of the batch. Weighing is performed under safe lighting if required by the procedure. The solvent and dispersant are selected by trial. For quantitative analysis, use separate standards with traceability.

What to Agree Before Ordering

Request CoA and SDS with CAS 3507-99-1, formula C18H35AgO2, silver content, moisture, free acid, and insoluble impurities. Clarify particle size distribution, light-protective packaging, and shelf life. For photographic materials, additionally agree on light sensitivity and suitability criteria for your formulation.

Safe Handling

Minimize exposure to light and dust generation. Work in a fume hood, use goggles, gloves, and closed clothing per SDS. Do not allow release into the environment or drains. Collect residues, contaminated wipes, filters, and containers separately as silver-containing waste; store in tightly closed light-protective packaging.