Overview
1-Naphthaleneacetic acid ( CAS 86-87-3 ), commonly abbreviated as NAA and also known as 1-naphthylacetic acid, is a synthetic auxin used in commercial agriculture to regulate plant growth and development.
It mimics the action of natural plant hormones, enabling precise control over rooting, fruit set, and thinning at the crop production scale. NAA is applied in fruit production to prevent pre-harvest drop in apples and pears.
This application protects yield quality ahead of harvest windows. In propagation operations, it promotes adventitious root formation on cuttings, accelerating establishment of ornamental, horticultural, and forestry stock.
Turf and nursery managers use it to stimulate uniform rooting in transplanted sod and container-grown plants. At low concentrations, it also functions as a fruit-thinning agent in apple orchards.
This process improves fruit size and marketable grade. 1-Naphthaleneacetic acid is supplied as a white to off-white crystalline powder. Technical grade is the standard commercial form for industrial use.
Material is also available at higher purity levels to meet formulation requirements for registered agrochemical products. It is typically offered in kilogram and multi-kilogram packaging suited to manufacturers.
These bulk quantities are ideal for concentrate manufacturers and formulation houses. The product ensures consistent performance across various agricultural and horticultural applications in global markets.
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Physical Properties
| Melting Point | 134.5-135.5 °C |
| Boiling Point | 280.69°C (rough estimate) |
| Density | 1.1032 (rough estimate) |
| Flash Point | >100°C |
| Appearance | α-Naphthyleneacetic acid is a white crystalline solid, needles, powder, or colorless liquid. Odorless. |
| Color | light yellow |
| Odor | Odorless |
| Form | crystalline |
| Water Solubility | Slightly soluble in water, ethanol, acetone, chloroform and ether. |
| Refractive Index | 1.6010 (estimate) |
| pH | 3.0 (0.6g/l, H2O, 25℃) |
| Log P | 2.240 |
Safety & Handling
Danger GHS05 GHS07 Hazard Statements H302 Harmful if swallowed H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H335 May cause respiratory irritation H412 Harmful to aquatic life with long lasting effects Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29163900 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 86-87-3
- EC Number
- 201-705-8
- Mol. Weight
- 186.21
- HS Code
- 29163900
- Category
- Organic Acids