Octyl gallate (Progallin O) is extensively used as a food additive with antibacterial and antioxidant effects. It has selective and sensitive fluorescence properties. Octyl gallate has significant antiviral effects against HSV-1, vesicular stomatitis virus (VSV) and poliovirus.

Physicochemical Properties

Molecular Formula	C15H22O5
Molecular Weight	282.3322
Exact Mass	282.146
CAS #	1034-01-1
PubChem CID	61253
Appearance	White to off-white solid powder
Density	1.2±0.1 g/cm3
Boiling Point	482.9±40.0 °C at 760 mmHg
Melting Point	101-104 °C(lit.)
Flash Point	177.1±20.8 °C
Vapour Pressure	0.0±1.3 mmHg at 25°C
Index of Refraction	1.552
LogP	5.26
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	9
Heavy Atom Count	20
Complexity	269
Defined Atom Stereocenter Count	0
InChi Key	NRPKURNSADTHLJ-UHFFFAOYSA-N
InChi Code	InChI=1S/C15H22O5/c1-2-3-4-5-6-7-8-20-15(19)11-9-12(16)14(18)13(17)10-11/h9-10,16-18H,2-8H2,1H3
Chemical Name	octyl 3,4,5-trihydroxybenzoate
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

ln Vitro	The antibacterial activity of octyl gallate against Helicobacter pylori has been reported, with a minimum inhibitory concentration (MIC) of 125 µg/mL[1].
References	[1]. Octyl gallate, a food additive with potential beneficial properties to treat Helicobacter pylori infection. Food Funct. 2017 Jul 19;8(7):2500-2511. [2]. Octyl gallate: An antioxidant demonstrating selective and sensitive fluorescent property. Food Chem. 2017 Mar 15;219:268-273. [3]. Antiviral effect of octyl gallate against DNA and RNA viruses. Antiviral Res. 2007 Feb;73(2):85-91.
Additional Infomation	Octyl gallate is a gallate ester obtained by condensation of the carboxy group of gallic acid with the hydroxy group of octanol. It has a role as a food antioxidant, a plant metabolite and a hypoglycemic agent. Octyl gallate is an antioxidant used in margarine Octyl gallate has been shown to exhibit anti-viral function (A7906).

Solubility Data

Solubility (In Vitro)

DMSO : ~125 mg/mL (~442.74 mM)

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	3.5420 mL	17.7098 mL	35.4195 mL
	5 mM	0.7084 mL	3.5420 mL	7.0839 mL
	10 mM	0.3542 mL	1.7710 mL	3.5420 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.