Solubility: NAA is pure white crystal, can dissolve in watereasily,can alsodissolve in polarity organic solvent such as ethanol, methanol and acetone etc.It’s stable in room temperature.Have naphthalene smell. Applications: NAA is a broad-spectrum based plant growth regulator, can promote cell division and expansion. It can be absorbed via root, stem or leaf and is widely used in agriculture, forestry, vegetable, flower, fruit etc. 1.Improve the formulation of root and adventitiousroot, can be used to promote seed rooting and cutting rooting and improve solanaceae formulating fibrous root. 2. Improve fruit and root tuber and stem tuber expanding. 3. Increase bloom and fruit bearing rate, prevent flower and fruit drop. It can also increase plant stress-resist ability. Target crops and effects: 1) Cereals: Promote effective tillering, increase thousand seed weight, increase yield; 2) Cotton: Reduce the dropping of cotton boll and increase the weight of cotton boll; 3) Fruits and vegetables: Keep flower, keep fruits setting, improve quality; Usage: 1. The wheat was infused with 20mg/kg of liquid for 10-12h, and the air dried sowing, with 25mg/kg spraying at the end of the first time, the blade and ear of the swordsman were sprayed with 30mg/kg, which could prevent the back down and increase the yield. 2. The rice was soaked with 10mg/kg of liquid seedling for 6h, and then it was planted with a thick and strong stem. 3. During the flowering period of cotton, spray the plant with 10 to 20mg/kg for 2 to 3 times, 10 days apart. 4. With 10mg/kg, the lower part (3cm) was planted in the lower part (3cm), and the survival rate increased. 5. Use 10-30mg/kg liquid spray on tomatoes and melons to prevent falling flowers and promote sitting fruit. 6. Spray the whole plant with 5-20mg/kg of liquid for 5-21 days before fruiting, and prevent the fruit from falling. 7. The cuttings of tea, mulberry, side cypress, oak tree, and hemlock were cut from 25 to 500mg/kg, and the base (3-5cm) of the cuttings of the cuttings was used to promote the root of the cuttings and increase the survival rate. 8. Ripe pineapple vegetation, each with 30 ml, concentration of 5 ~ 10 PPM of naphthalene acetic acid aqueous solution into the nucellus, can be directly change the vegetative growth to reproductive growth, make the pineapple budding 1 ~ 2 years in advance, greatly improving the output of per unit area. 9. Citrus fruit thinning with naphthalene acetic acid (200 ~ 300 parts per million, applied in 10 ~ 30 days after flowering stage, have the effect of thinning on wenzhou mandarin, but, as in more than 50 days after flowering, the fruit for more than 20 mm in diameter, there would be no fruit thinning effect. 10. To promote the healing of grafting by 1 gram of naphthyl acetate and 100 grams of water into a solution, and then cut into strips with waste paper into the solution, and then remove the dried and dried into a hormone paper.It is beneficial to the formation of callus in the grafting part of the fruit.Compared with unwrapped, can live 3~5 days early. 11. Hawthorn promotes seed germination of hawthorn seed shell thick and hard, it is difficult to germinate, and it takes two winters to germinate using the general method of laminating process.The seed germination of hawthorn seeds can be promoted by using a solution of 50~100 mg/l.