| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_76e93ce7513efa5c1beeef3c82266657 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B67-0034
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B21-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D279-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B67-0096 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D279-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B21-00 |
| filingDate |
2020-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ad16f63ba1415b828524d71fd1d88633
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3157c1d83fbeec40b4fc1efb91dd07b0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_44765c164b14c7154821ff1c01f7e35e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9db14ba663c8072ecd9b7d49b4aab5ee |
| publicationDate |
2021-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-3795565-A1 |
| titleOfInvention |
Improved process for the purification of methylene blue |
| abstract |
The present application provides method for producing methylene blue that includes the steps of providing a reaction mixture having one or more methylene blue intermediates; precipitating metal from the reaction mixture; and producing therefrom crude methylene blue. The crude may further be purified, resulting in methylene compounds having low impurities, preferably having a purity greater than about 97%, having Azure B impurity no greater than 2.5 %, and/or a total metal content no greater than 77 ppm. Formulations containing such compounds are also provided. |
| priorityDate |
2019-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |