9-18-9-1S is a high-purity plant food manufactured entirely from high-grade 100% ortho white phosphoric acid (arsenic free), potassium hydroxide, ammonium hydroxide, ammonium thiosulfate and low-biuret urea.
One of the most established fertilizers, this product contains a higher concentration of nitrogen for when the situation requires it as well as sulfur.
• Water white
- Specific gravity: 1.34
- pH: 6.7-7.2 (1:1 solution)
- Initial crystallization point: -2° F
- Sodium (Na ppm), < 2,500
- Aluminum (Al ppm), < 10
- Arsenic, (As ppm), < 1
- Cadmium, (Cd ppm), < 0.5
- Lead (Pb ppm), < 3
- Total Heavy Metals (as Pb ppm), < 5
- Lb/gal = 11.15
- Indefinite, exceeds 36 Months