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4-Hydroxybenzaldehyde CAS 123-08-0

Name: 4-Hydroxybenzaldehyde CAS 123-08-0
Availability: InStock

3-Amino-1,2,4-triazole (CAS 61-82-5; also known as amitrole, 3-AT, 3-amino-1H-1,2,4-triazole or triazol-3-amine) is a white to slightly yellow crystalline powder. It is a heterocyclic compound carrying an amino substituent on the 1,2,4-triazole ring, valued as a versatile building block for triazole derivatives and as a biologically active agent in agrochemical and biochemical research.
With a molecular weight of 84.08 and excellent water solubility (about 280 g/L at 20 °C), 3-amino-1,2,4-triazole is widely used in organic synthesis, pharmaceutical intermediates, agrochemicals and biochemical assays. As a direct-source manufacturer, Leafchem supplies this product in both Standard and Premium grades, with a minimum order quantity of 500 kg and stable bulk supply capacity.

Order(MOQ) :
500kgs
Product Origin :
China
Color :
White to slightly yellow
Shipping Port :
Shanghai, China
Lead Time :
2-3 weeks
Weight :
25kg
Cas No. :
61-82-5
Molecular Formula :
C₂H₄N₄
Appearance :
White to slightly yellow crystalline powder
Assay :
≥98.0% (Standard) / ≥99.0% (Premium)
Application :
Agrochemical intermediate, pharmaceutical intermediate, biochemical research

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Product Details

3-Amino-1,2,4-triazole is an amino-substituted 1,2,4-triazole that decomposes on strong heating. It is freely soluble in water and polar organic solvents such as methanol, ethanol and chloroform, slightly soluble in ethyl acetate, and practically insoluble in ether and acetone. Its aqueous solution (100 g/L) is nearly neutral, with a pH of approximately 6.4–7.4. The compound is well known as a non-selective herbicide active ingredient (amitrole) and, at the same time, as a useful catalytic inhibitor of catalase in biochemical studies.
The amino group on the triazole ring makes the molecule a reactive synthon for condensation, ring construction and salt formation, which underpins its use in manufacturing pharmaceutical intermediates, dyestuffs and functional triazole derivatives. Leafchem controls the melting range, residue on drying and assay tightly to meet both industrial and research-grade requirements.

Core Advantages

High Purity & Stable Batch Consistency: Strict quality control ensures high‑grade product with low impurity content; batch‑to‑batch uniformity reduces formula deviation for downstream synthesis.

Good Solubility Performance: Readily soluble in water and polar solvents, convenient for dosing and reaction operation in industrial synthesis processes.

Versatile Synthetic Building‑block: Serves as key intermediate for pesticide, pharmaceutical and fine chemical synthesis; suitable for cyclization and condensation reactions to produce multiple derivative products.

Complete Compliance Documents: Supports provision of COA, MSDS, HPLC test reports, meeting international procurement requirements for fine‑chemical manufacturers.

Reliable Bulk Supply Capacity: Available for bulk order starting from 500 kg; stable stock and production capacity to support continuous large‑scale production of customers.

Strict Physical‑chemical Index Control: Tightly controlled moisture, ash and heavy‑metal indicators, minimizing side‑reaction risks during synthesis.

Technical Specifications

Item	Typical Parameters	Test Standard / Remarks
Product Name	4-Hydroxybenzaldehyde (PHBA)	Aliases: p-Hydroxybenzaldehyde, 4-Formylphenol, p-Formylphenol
CAS Number	123-08-0	Global universal product identifier
EINECS Number	204-599-1	EU regulatory identifier
Molecular Formula	C₇H₆O₂	—
Molecular Weight	122.12 g/mol	—
Appearance	White to light yellow crystalline powder	Faint aromatic odor
Assay	≥99.8% Refined / ≥99.5% Semi-refined / ≥99.0% Crude	By grade
Melting Point	114.5–118 °C (by grade)	Literature mp ~112–118 °C
Boiling Point	Approx. 191 °C at 50 mmHg	Literature value
Density	Approx. 1.129 g/cm³ (25 °C)	Literature value
Solubility	Slightly soluble in water (~13.8 g/L at 30 °C); soluble in ethanol, ether, acetone and ethyl acetate; soluble in hot benzene	—
pKa (25 °C)	Approx. 7.61	Literature value
Flash Point	Approx. 174 °C	Literature value
Chloride	≤50 ppm (Refined & Semi-refined)	—
Heavy Metals (as Pb)	≤8 ppm (Refined & Semi-refined)	—
Storage	Store below 30 °C, sealed, dry and away from light	—

Quality Specification

Test Item	Refined Grade	Semi-refined Grade	Crude Grade
Appearance	White crystalline powder	Light yellow crystalline powder	Light yellow crystalline powder
Purity, % ≥	99.8	99.5	99.0
Moisture, % ≤	0.3	0.3	0.5
Melting Point, °C	115.5–118	115–118	114.5–116.5
Chloride, ppm ≤	50	50	—
Heavy Metals, ppm ≤	8	8	—
Insoluble Matter, % ≤	0.05	0.05	—

Key Application Fields

Pharmaceutical intermediates. It is used to synthesize sulfonamide antibacterial potentiators such as trimethoprim (TMP), ampicillin, semi-synthetic oral penicillins and p-hydroxyphenylglycine.

Fragrance & flavor industry. It is a key intermediate for raspberry ketone, methyl and ethyl vanillin, anisaldehyde and nitrile-type fragrances.

Agrochemicals. It is used in the synthesis of novel insecticides and herbicides, including bromoxynil and hydroxy-dicarboxylic herbicide intermediates.

Electroplating brightener. It serves as a new-type cyanide-free brightener in the electroplating industry.

Liquid crystal & specialty chemicals. It is also applied in liquid crystal materials and other fine chemical formulations.

FAQ ：

Q1: What is 4-Hydroxybenzaldehyde and what are its common names?

A: 4-Hydroxybenzaldehyde (CAS 123-08-0, EINECS 204-599-1), commonly abbreviated PHBA, is also known as p-hydroxybenzaldehyde or 4-formylphenol. It appears as a white to light yellow crystalline powder with a faint aromatic odor.

Q2: What are the minimum order quantity and lead time?

A: The MOQ is 500 kg. Standard lead time is 2–3 weeks after order confirmation, subject to order quantity and grade.

Q3: Is 4-Hydroxybenzaldehyde soluble in water?

A: It is only slightly soluble in water (about 13.8 g/L at 30 °C), but readily soluble in ethanol, ether, acetone and ethyl acetate, and soluble in hot benzene.

Q4: What grades do you offer?

A: We supply Refined Grade (purity ≥99.8%, moisture ≤0.3%, mp 115.5–118 °C), Semi-refined Grade (purity ≥99.5%, moisture ≤0.3%, mp 115–118 °C) and Crude Grade (purity ≥99.0%, moisture ≤0.5%, mp 114.5–116.5 °C). Chloride, heavy metals and insoluble matter are controlled in the Refined and Semi-refined grades.

Q5: What are the main applications?

A: It is a key intermediate for pharmaceuticals (TMP, ampicillin, p-hydroxyphenylglycine), fragrances (raspberry ketone, vanillin derivatives), agrochemicals (bromoxynil and herbicide intermediates), cyanide-free electroplating brighteners and liquid crystal materials.

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4-Hydroxybenzaldehyde CAS 123-08-0

Agrochemical intermediate

Pharmaceutical & organic synthesis

Biochemical research reagent

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