Gallic acid CAS 149-91-7

Gallic acid (GA) is a component of hydrolyzable tannins, also known as gallic acid, chemical name 3,4,5-trihydroxybenzoic acid. The content of gallic acid in Yunnan Pu'er tea is relatively high.

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Model:
149-91-7
Brand:
futurechemical
Code:
149-91-7

Product Description

Gallic acid Basic information
Product Name:	Gallic acid
CAS:	149-91-7
MF:	C7H6O5
MW:	170.12
EINECS:	205-749-9
Mol File:	149-91-7.mol
Gallic acid Chemical Properties
Melting point	251 °C (dec.) (lit.)
Boiling point	259.73°C (rough estimate)
density	1.694
vapor pressure	0Pa at 25℃
refractive index	1.5690 (estimate)
storage temp.	2-8°C
solubility	Methanol (Slightly), Water (Slightly, Heated)
pka	4.41(at 25℃)
form	Powder
color	Off-white
PH	3.75(1 mM solution);3.22(10 mM solution);2.71(100 mM solution)
biological source	plant fruit
Water Solubility	12 g/L cold water
Merck	144,345
BRN	2050274
Stability:	Stability Stable, but may discolour upon exposure to light. Hygroscopic. Incompatible with strong oxidizing agents, strong bases, acid chlorides, acid anhydrides.
InChIKey	LNTHITQWFMADLM-UHFFFAOYSA-N
LogP	0.7
CAS DataBase Reference	149-91-7(CAS DataBase Reference)
NIST Chemistry Reference	Benzoic acid, 3,4,5-trihydroxy-(149-91-7)

Items	Standards
Appearance	A white to beige powder
Purity, %	99.0 Min.
SOLUBILITY(TURBIDITY) 50MG/ML ETOH	Clear
Loss on drying, %	0.5, Max.
Residue on ingnition,%	0.1 ,Max.
Tannic acid test	No turbidity
Sulfate %	0.01% Max.
As, ppm	3.0, Max.
Pb, ppm	10, Max.

Gallic acid 149-91-7 C₇H₆O₅ Food additives Cosmetic antioxidants Plastic flame retardants Ultraviolet absorbers Semiconductor photoresists Drilling mud fluidizers Agricultural plant growth regulators

Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

FAQ From Customers

Q1: What is the minimum order quantity?

A: There is no quantity limit for the first sample or trial order. Just tell us the actual quantity you need.
Q2: How can I confirm that the quality meets the requirements?

A: Provide your specifications, and our technical team will check them or customize them for you; we can provide TDS, MSDS, and COA, and accept third-party testing.
Q3: How do you ensure stable quality?

A: We manufacture under an ISO 9001 quality system, test every batch before release, and retain samples for 24 months for traceability.
Q4: Do you provide samples?

A: Yes — Free samples are available; freight is at buyer's expense for express delivery.