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Introducción del producto
| Parameter | PBA-1 (Photographic Bleach Accelerator, Kodak Type) | PBA-1 (Organic Intermediate, CAS 82190-89-4) |
|---|---|---|
| Chemical Category | 5-Amino-1,3,4-thiadiazole-2-thiol derivative | Aromatic heterocyclic intermediate |
| CAS Number | Unpublicized (proprietary Kodak formulation) | 82190-89-4 |
| Molecular Formula | C₂H₃N₃S₂ (typical core structure) | C₁₀H₁₂N₂O₂ (commercial reported formula) |
| Molecular Weight | ~133.2 g/mol (core structure) | ~192.22 g/mol |
| Physical Appearance | Yellow crystalline powder; Odorless | Off-white to light yellow powder; Faint odor |
| Melting Point | 220–225 °C (decomposes slightly) | 145–148 °C |
| Solubility | Soluble in alkaline aqueous solutions; Slightly soluble in ethanol; Insoluble in ether | Soluble in DMF, DMSO, ethyl acetate; Slightly soluble in methanol; Insoluble in water |
| Key Applications | Bleach accelerator for black-and-white/color film processing; Improves bleach efficiency and reduces processing time | Intermediate for agrochemicals and pharmaceutical synthesis; Ligand precursor for coordination chemistry |
| Chemical Properties | Reacts with strong acids to release toxic gas; Oxidizable in air; Contains thiol group (-SH) with strong chelating ability | Stable under neutral conditions; Reacts with strong bases; Compatible with most organic synthesis reagents |
| Safety & Hazards | - Mild skin/respiratory irritation- Risk of thyroid inhibition with long-term exposure- Avoid contact with acids and strong oxidizers | - Mild eye irritation- Low acute oral toxicity- Dust inhalation may cause respiratory discomfort |
| Storage Requirements | Store in sealed, light-resistant containers; Cool, dry, well-ventilated area; Separate from acids and oxidants | Store in sealed containers; Protect from moisture and direct sunlight; Keep away from strong bases |
| Regulatory Notes | Complies with photographic chemical industry standards; No special transportation restrictions | Subject to local hazardous chemical handling regulations; Not listed as a controlled substance |
