Humic Acids
CAS: 1415-93-6
Category: Organic Intermediates
| Purity | Raw Humic Acid (30–50% humic content), Technical Grade (50–70%), High-Purity Grade (70–85%), Analyti |
| Molecular Formula | C₁₈₇H₁₈₆O₈₉N₉S₁ |
| Molecular Weight | typically 2,000 – 50,000 |
| Appearance | Dark brown to black amorphous powder, granules, or colloidal solution |
| Packaging | 25kg/plastic-lined paper bag or woven bag; 500g/1kg/5kg/aluminum foil bag; 1000kg/super sack; or customer-specified packaging |
| Testing Indicators | Appearance — Visual inspection; Humic acid content — Alkaline extraction + gravimetric or UV-Vis spectrophotometry (absorbance at 465 nm); Fulvic acid content — UV-Vis or colorimetry; Moisture content — Loss on drying (105°C); Ash content — Muffle furnace (750°C); pH (1% solution) — Potentiometry; Cation exchange capacity (CEC) — Ammonium acetate or barium chloride method; Total organic carbon (TOC) — Combustion + IR detection; Functional group analysis — FTIR; Heavy metals (Pb, Cd, As, Hg) — ICP-MS or AAS; Particle size — Sieve analysis or laser diffraction; Water solubility — Gravimetry; E4/E6 ratio (humification index) — UV-Vis spectrophotometry (absorbance ratio at 465 nm/665 nm). |
| Storage Notes | Stored in a tightly sealed container in a cool, dry, well-ventilated area, protected from moisture and direct sunlight; away from strong oxidizers, strong bases, and heat sources; avoid dust formation (may be combustible as fine dust); stable under normal storage conditions. |
| Lead Time | days |
Used as a soil conditioner and fertilizer additive to improve soil structure, water retention, and nutrient availability (chelating agent for metal ions); in animal feed additives for improved gut health and growth; in environmental remediation for heavy metal immobilization and pollutant adsorption; in drilling fluids (oil and gas industry); as a natural chelator in hydroponic solutions; in industrial water treatment; and in the production of humic-based biostimulants for agriculture.