If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
403040
Tannic acid
ACS reagent grade, powder or solid
Synonym(s):
Gallotannin, Tannin
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| Pack Size | SKU | Availability | Price |
|---|
About This Item
Product Name
Tannic acid, ACS reagent
grade
ACS reagent
Quality Segment
form
powder or solid
autoignition temp.
980 °F
impurities
≤0.003% Lead
ign. residue
≤0.5%
loss
≤12.0% loss on drying, 105°C
mp
218 °C (lit.)
cation traces
Zn: ≤0.005%, heavy metals: ≤0.003%
functional group
ester, ether
SMILES string
Oc1cc(cc(O)c1O)C(=O)Oc2cc(cc(O)c2O)C(=O)OC[C@H]3O[C@@H](OC(=O)c4cc(O)c(O)c(OC(=O)c5cc(O)c(O)c(O)c5)c4)[C@H](OC(=O)c6cc(O)c(O)c(OC(=O)c7cc(O)c(O)c(O)c7)c6)[C@@H](OC(=O)c8cc(O)c(O)c(OC(=O)c9cc(O)c(O)c(O)c9)c8)[C@@H]3OC(=O)c%10cc(O)c(O)c(OC(=O)c%11cc(O)c(O)c(O)c%11)c%10
InChI
1S/C76H52O46/c77-32-1-22(2-33(78)53(32)92)67(103)113-47-16-27(11-42(87)58(47)97)66(102)112-21-52-63(119-72(108)28-12-43(88)59(98)48(17-28)114-68(104)23-3-34(79)54(93)35(80)4-23)64(120-73(109)29-13-44(89)60(99)49(18-29)115-69(105)24-5-36(81)55(94)37(82)6-24)65(121-74(110)30-14-45(90)61(100)50(19-30)116-70(106)25-7-38(83)56(95)39(84)8-25)76(118-52)122-75(111)31-15-46(91)62(101)51(20-31)117-71(107)26-9-40(85)57(96)41(86)10-26/h1-20,52,63-65,76-101H,21H2/t52-,63-,64+,65-,76+/m1/s1
InChI key
LRBQNJMCXXYXIU-PPKXGCFTSA-N
General description
Application
- Synthesis of ferric tannate complexes by reacting with metallic iron.
- As a protein deproteinizing agent in genomic and plasmid DNAs preparation.
- As a reductant in the synthesis of metal nano particles.
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This Item | |||
|---|---|---|---|
| grade ACS reagent | grade - | grade pharmaceutical secondary standard, reference material | grade Halal, Kosher |
| Quality Level 200 | Quality Level 200 | Quality Level 300 | Quality Level 300, 400 |
| form powder or solid | form powder | form - | form - |
| cation traces Zn: ≤0.005%, heavy metals: ≤0.003% | cation traces - | cation traces - | cation traces - |
| mp 218 °C (lit.) | mp 218 °C (lit.) | mp 218 °C (lit.) | mp 218 °C (lit.) |
| impurities ≤0.003% Lead | impurities dextrines, gum matters, in accordance, resinous matters, in accordance | impurities - | impurities - |
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Storage Class
11 - Combustible Solids
wgk
WGK 2
flash_point_f
390.2 °F
flash_point_c
199 °C
ppe
Eyeshields, Gloves, type N95 (US)
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Global Trade Item Number
| SKU | GTIN |
|---|---|
| 403040-500G | 04061831986440 |
| 403040-50G | 04061835365739 |
| 403040-100G | 04061831986433 |
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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What are the best storage conditions for a tannic acid solution in water, and how long can it be stored in solution form?
1 answer-
Tannic acid in solution is relatively stable. Stability studies have not been performed on the prepared solution and there is no recommended shelf life. However, commercially available tannic acid solutions can be found that, while packaged in opaque or amber bottles, have no expiration date. Based on the Safety Data Sheet, this material is not especially sensitive to light, air, or humidity.
This product is not assigned an expiration or retest date. A one year warranty is supplied from the date of shipment. For more information please access the "Product Dating Information" document under "ADDITIONAL USEFUL DOCUMENTS ABOUT OUR PRODUCTS" at the bottom of the Quality Services page with this link: https://www.sigmaaldrich.com/life-science/quality-and-regulatory-management/quality-services.
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What is the best way to prepare a solution of Product 403040, Tannic acid?
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Product 403040 Tannic acid, is soluble in water (250 mg/ml), 100% ethanol, acetone, and warm glycerol. It is insoluble in chloroform.
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