Exact Mass: 443.2335

Exact Mass Matches: 443.2335

Found 7 metabolites which its exact mass value is equals to given mass value 443.2335, within given mass tolerance error 0.001 dalton. Try search metabolite list with more accurate mass tolerance error 0.0002 dalton.

Rhodamine B

N-[9-(2-Carboxyphenyl)-6-(diethylamino)-3H-xanthen-3-ylidene]-N-ethylethanaminium(1+), 9ci

C28H31N2O3+ (443.2335)

Rhodamine B (RhB), also known as rhodamine 610 chloride (CAS: 81-88-9), belongs to the class of organic compounds known as xanthenes. These are polycyclic aromatic compounds containing a xanthene moiety, which consists of two benzene rings joined to each other by a pyran ring. Rhodamine B is a highly-soluble, basic, red, synthetic dye that is widely used in many industries (e.g. paper, plastic, textiles, ceramics, cosmetics). In the past, it was used extensively as a low-cost food colourant (e.g. in paprika- and chilli-containing foods) but it has since been prohibited for use as a food additive due to its carcinogenicity, reproductive and developmental toxicity, and neurotoxicity (PMID: 30463493). Due to its photostability and solubility, rhodamine B is also used as a fluorescent dye to stain biological tissues (PMID: 28957318). Rhodamine B /ˈroʊdəmiːn/ is a chemical compound and a dye. It is often used as a tracer dye within water to determine the rate and direction of flow and transport. Rhodamine dyes fluoresce and can thus be detected easily and inexpensively with fluorometers. Rhodamine B is used in biology as a staining fluorescent dye, sometimes in combination with auramine O, as the auramine-rhodamine stain to demonstrate acid-fast organisms, notably Mycobacterium. Rhodamine dyes are also used extensively in biotechnology applications such as fluorescence microscopy, flow cytometry, fluorescence correlation spectroscopy and ELISA.[citation needed] Rhodamine B is often mixed with herbicides to show where they have been used.[2] It is also being tested for use as a biomarker in oral rabies vaccines for wildlife, such as raccoons, to identify animals that have eaten a vaccine bait. The rhodamine is incorporated into the animal's whiskers and teeth.[3] Rhodamine B is an important hydrophilic xanthene dye well known for its stability and is widely used in the textile industry, leather, paper printing, paint, coloured glass and plastic industries.[4] Rhodamine B (BV10) is mixed with quinacridone magenta (PR122) to make the bright pink watercolor known as Opera Rose.[5] Rhodamine B can exist in equilibrium between two forms: an "open"/fluorescent form and a "closed"/nonfluorescent spirolactone form. The "open" form dominates in acidic condition while the "closed" form is colorless in basic condition.[6] The fluorescence intensity of rhodamine B will decrease as temperature increases.[7] The solubility of rhodamine B in water varies by manufacturer, and has been reported as 8 g/L and ~15 g/L,[1] while solubility in alcohol (presumably ethanol) has been reported as 15 g/L.[nt 1] Chlorinated tap water decomposes rhodamine B. Rhodamine B solutions adsorb to plastics and should be kept in glass.[8] Rhodamine B is tunable around 610 nm when used as a laser dye.[9] Its luminescence quantum yield is 0.65 in basic ethanol,[10] 0.49 in ethanol,[11] 1.0,[12] and 0.68 in 94\% ethanol.[13] The fluorescence yield is temperature dependent;[14] the compound is fluxional in that its excitability is in thermal equilibrium at room temperature.[15] In California, rhodamine B is suspected to be carcinogenic and thus products containing it must contain a warning on its label.[16] Cases of economically motivated adulteration, where it has been illegally used to impart a red color to chili powder, have come to the attention of food safety regulators.[17]

Exact Mass: 443.2335

Exact Mass Matches: 443.2335

Rhodamine B

Xanthylium, 9-(2-carboxyphenyl)-3,6-bis(diethylamino)-, molybdatephosphate

rhodamine 6G cation

N-[12(S)-hydroperoxy-(5Z,8Z,10E,14Z)-icosatetraenoyl]taurine

N-[15(S)-hydroperoxy-(5Z,8Z,11Z,13E)-icosatetraenoyl]taurine

Rhodamine

ST 20:1;O3;Tau