TKPP
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Product Description
Chemical Name: Tetra potassium pyrophosphate
Molecular Formula: K₄P₂O₇
Molecular Weight: 330.34
CAS No.: 7320-34-5
EINECS: 230-785-7
▏Properties
The relative density of tetra potassium pyrophosphate is 2.534 and the melting point is 1109 ° C. It is soluble in water and has a solubility of 187 g / 100 g of water (25 ° C). And the aqueous solution was alkaline, 1% aqueous solution pH = 10.5. But insoluble in ethanol.
▏Composition
NO. | TEST | SPECIFICATION |
1 | Appearance | White powder |
2 | Assay | ≥98.0% |
3 | Fe | ≤0.03% |
4 | pH | 10-11 |
5 | Insoluble matters in water | ≤0.1% |
▏Application
Crop | Application Method | Dosage Range (per hectare per application) | Application Period | Notes |
Food crops (wheat, corn) | Foliar spray | 750-1200 g (mixed with 450-600 liters of water) | Jointing stage, booting stage, filling stage | Concentration 0.1%-0.2%; avoid spraying during midday high temperatures |
Drip irrigation/fertigation | 22.5-37.5 kg | Seedling stage, heading stage | Apply in 2-3 splits with 10-15 days interval | |
Commercial crop (cotton, peanut) | Foliar spray | 600-900 g (mixed with 375-450 liters of water) | Flower and boll stage, pod-setting stage | Focus on spraying the back of leaves to improve absorption efficiency |
Basal mixing | 30-45 kg | During soil preparation before sowing | Apply with organic fertilizer (3000-4500 kg/ha) | |
Fruit trees (apple, citrus) | Foliar spray | 1200-1800 g (mixed with 600-750 liters of water) | Flower bud differentiation stage, fruit enlargement stage | Spray before fruit coloring to increase sugar content by 0.8-1.2 degrees |
Rhizosphere topdressing | 45-75 kg | Germination stage, after fruit harvest | Apply in furrows along the tree crown drip line, 20-30 cm deep | |
Vegetables (tomato, cucumber) | Foliar spray | 450-750 g (mixed with 300-450 liters of water) | Flowering and fruiting stage, fruit enlargement stage | Apply once every 10 days, 2-3 times continuously
|
Root dipping/irrigation | 1.5-2.25 kg (mixed with 750 liters of water) | During transplanting or seedling stage | Soak roots for 5-8 minutes; avoid direct contact with stem bases | |
Fruit trees (grape) | Foliar spray | 900-1500 g (mixed with 525-675 liters of water) | New shoot growth stage, berry enlargement stage | Reduce dosage by 20% in rainy seasons to prevent nutrient leaching |
Flowers | Foliar spray | 300-600 g (mixed with 225-300 liters of water) | Flower bud formation stage, before flowering | Dilute thoroughly to avoid leaf burn from high concentration |
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