There will be a HazMat fee per item when shipping a dangerous goods. The HazMat fee will be charged to your UPS/DHL/FedEx collect account or added to the invoice unless the package is shipped via Ground service. Ship by air in Excepted Quantity (each bottle), which is up to 1g/1mL for class 6.1 packing group I or II, and up to 25g/25ml for all other HazMat items.
Type | HazMat fee for 500 gram (Estimated) |
Excepted Quantity | USD 0.00 |
Limited Quantity | USD 15-60 |
Inaccessible (Haz class 6.1), Domestic | USD 80+ |
Inaccessible (Haz class 6.1), International | USD 150+ |
Accessible (Haz class 3, 4, 5 or 8), Domestic | USD 100+ |
Accessible (Haz class 3, 4, 5 or 8), International | USD 200+ |
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CAS No. : | 5997-42-2 | MDL No. : | N/A |
Formula : | C4H4O4 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | JLXQJNCZXSYXAK-REOHCLBHSA-N |
M.W : | 116.07 | Pubchem ID : | 15074860 |
Synonyms : |
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Signal Word: | Danger | Class: | 4.1 |
Precautionary Statements: | P240-P210-P241-P264-P280-P302+P352-P370+P378-P337+P313-P305+P351+P338-P362+P364-P332+P313 | UN#: | 1325 |
Hazard Statements: | H315-H319-H228 | Packing Group: | Ⅱ |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
59% | In tetrahydrofuran; at 0 - 20℃; for 3.0h; | Lac-OCA was prepared as described previously [9-11], however, triphosgene was used rather than diphosgene. Briefly, the lithium salt of L-lactic acid (0.5 mol) was suspended in anhydrous THF (350 mL) at 0 C. Next, a solution containing triphosgene (0.3 mol) in anhydrous THF (150 mL) was added dropwise at 0-5 C, and the reaction mixture was stirred at room temperature for 3 h. THF was removed under reduced pressure, and diethyl ether (1 L) was added to the residue. Lastly, the lithium salts were removed by filtration, and recrystallization from tert-butyl methyl ether afforded colorless crystals in 59% yield. |