1-Naphthaleneacetic acid

Agent Name
1-Naphthaleneacetic acid
Alternative Name
alpha-Naphthylacetic acid
CAS Number
Major Category
1-Naphthaleneacetic acid formula graphical representation
alpha-Naphthylacetic acid; 1-Naphthylacetic acid; 1-Naphthylessigsaeure; 2-(1-Naphthyl)acetic acid; 2-(alpha-Naphthyl)ethanoic aid; ANU; Acide naphthylacetique [French]; Acide naphtylacetique [French]; Acide naphtylacetique [ISO-French]; Agronaa; Alman; Alphaspra; Appl-set; Biokor; Celmone; Etifix; Floramon; Fruit Fix; Fruitofix; Fruitone N; Hormofix; Klingtite; Kyselina 1-naftyloctova [Czech]; Liqui-stik; N 10; NAA; NAA 800; NU-Tone; Nafusaku; Naphthalene-1-acetic acid; Naphthaleneacetic acid; Naphthaleneacetic acid (VAN); Naphthyl-1-essigsaeure [German]; Naphyl-1-essigsaeure [German]; Niagara-stik; Phyomone; Pimacol-sol; Planofix; Planofixe; Plucker; Pomoxon; Primacol; Rasin; Regenasol; Rhizopon B; Rhodofix; STIK; Stafast; Stop-Drop; Tekkam; Tip-Off; Transplantone; Tre-Hold; Vardhak; alpha-NAA; alpha-Naphthyleneacetic acid; alpha-Naphthylessigsaeure [German]; [ChemIDplus]
Plant Growth Regulators
White odorless solid; [Hawley] White or beige powder; [MSDSonline]
Used as a plant growth regulator, abscission promoter, and substrate for auxin inducers of specific plant enzymes; Stimulates root formation in cuttings of woody, herbaceous plants, and vines; Prevents premature flower and fruit drop; Controls regrowth of tree sprouts after trimming; Inhibits sprouting in stored potato, turnip, and ornamental bulbs; [HSDB] Registered for use on fruit crops and ornamentals; [Reference #1]
A skin and mucous membrane irritant; A severe eye irritant; High-dose animal studies: reduce food intake, decreased hemoglobin, increased liver enzymes; [HSDB] The naphthalene acetates are metabolized in the body and excreted as glycine and glucoronic acid conjugates within 48 hours of exposure; The most common effect seen in high-dose animal studies is a reduction in body weight; 1-naphthaleneacetic acid derivatives covered in the RED are the acetamide (CAS # 86-86-2), potassium salt (CAS # 15165-79-4), ammonium salt (CAS # 25545-89-5), sodium salt (CAS # 61-31-4), and ethyl ester (CAS # 2122-70-5);[Reference #1]
See Reference #1.
Reference Link #1
Biomedical References

Exposure Assessment

Vapor Pressure
1.59E-05 mm Hg
Lethal Concentration
LC50 (rat) > 207,000 mg/m3

Adverse Effects

Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion

Diseases, Processes, and Activities Linked to This Agent


Industrial Processes with risk of exposure: