Tetrabutylammonium Hydroxide

Name: Tetrabutylammonium Hydroxide
SKU: 0

CAS No.: 2052-49-5
Molecular Formula: C16H37NO
Molecular Weight: 259.47

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product description

At room temperature, it is a white crystalline powder with a fine crystal structure. It is hygroscopic and readily deliquesces into a paste when exposed to air. Due to the extremely strong hygroscopicity of pure products, they are mostly supplied in the form of aqueous solutions or alcohol solutions (such as methanol and ethanol solutions) in industry, with concentrations typically ranging from 10% to 50%.

Chemical Properties

Property	Value
Melting Point	27-30 °C(lit.)
Boiling Point	100 °C
Density	0.995
Vapor Density	1 (vs air)
Vapor Pressure	2.3 kPa (@ 20°C)
Refractive Index	1.4
Fp	7°C
Storage Temp.	Store below +30°C.
Solubility	Miscible with organic solvents.
Form	Solution
Color	APHA: ≤30
Specific Gravity	0.8586
Odor	Odorless
PH	14 (20°C in H2O)
PH Range	14
Explosive limit	5.5-36.5% (v/v) Methanol)
Water Solubility	Soluble in water, methanol.
Sensitive	Air Sensitive/Hygroscopic
BRN	3571228
Exposure limits	ACGIH: TWA 200 ppm; STEL 250 ppm (Skin)OSHA: TWA 200 ppm(260 mg/m3)NIOSH: IDLH 6000 ppm; TWA 200 ppm(260 mg/m3); STEL 250 ppm(325 mg/m3)
Stability:	Volatile
InChIKey	VDZOOKBUILJEDG-UHFFFAOYSA-M
LogP	1.517 at 25℃
CAS DataBase Reference	2052-49-5(CAS DataBase Reference)
EPA Substance Registry System	1-Butanaminium, N,N,N-tributyl-, hydroxide (2052-49-5)

Safety Information

Property	Value
Hazard Symbols	C, T, F, Xn
Hazard Class Codes	34-36/38-23/24/25-11-67-39/23/24/25-36-65-63-38-48/20-35-20/21/22-10-68/20/21/22
Safety Descriptions	7-16-26-36/37/39-45-36/37-62-27
UN Dangerous Goods Number	UN 3267 8/PG 2
WGK Germany	1
RTECS Number	BS5425000
F	9-34
Hazard Note	Highly Flammable / Toxic / Corrosive / Air Sensitive / Hygroscopic
TSCA	TSCA listed
Hazard Class	3
Packing group	II
HS Code	29239000
Storage Class	8A - Combustible, corrosive substances
Hazard Class (category)	Serious damage, Category 1 Skin corrosion, Category 1

Product Usage
Tetrabutylammonium Hydroxide is a strong alkaline quaternary ammonium salt, appearing as a colorless and transparent liquid. It is easily soluble in water and ethanol, with strong alkalinity, good solubility and phase transfer catalytic performance, and no obvious irritation. Its core application is in the field of organic synthesis, serving as a phase transfer catalyst to accelerate the reaction between aqueous and organic phases, improving reaction efficiency and product purity. It can also be used as an alkaline catalyst for drug synthesis and spice preparation. In addition, it is used in the synthesis of organosilicon materials, acid-base titration analysis, and cleaning in the semiconductor industry, being an essential key raw material in fine chemical, pharmaceutical and electronic fields.

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