Composti del boro
I composti del boro (B) comprendono una vasta gamma di specie chimiche contenenti atomi di boro. Questi composti sono noti per le loro proprietà uniche e le diverse applicazioni in vari campi come la scienza dei materiali, l'elettronica e la farmaceutica. I composti del boro sono fondamentali nella sintesi di vetro borosilicato, ceramiche e come catalizzatori in reazioni organiche. Da CymitQuimica, offriamo una selezione completa di composti di boro di alta qualità per supportare le vostre ricerche e applicazioni industriali, garantendo risultati affidabili ed efficaci nei vostri progetti.
Trovati 2283 prodotti di "Composti del boro"
Ordinare per
Purezza (%)
0
100
|
0
|
50
|
90
|
95
|
100
5-Methyl-2-thiopheneboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C5H7BO2SPurezza:97.0 to 115.0 %Colore e forma:White to Yellow to Orange powder to crystalPeso molecolare:141.982,4,6-Triphenylboroxin
CAS:Formula:C18H15B3O3Purezza:>98.0%(T)(HPLC)Colore e forma:White to Almost white powder to crystalPeso molecolare:311.754-Formylphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C7H7BO3Purezza:97.0 and le 114.0 %Colore e forma:White to Orange to Green powder to crystalPeso molecolare:149.942-Ethoxy-5-methylphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C9H13BO3Purezza:97.0 to 111.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:180.012-(3-Buten-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (stabilized with Phenothiazine)
CAS:Formula:C10H19BO2Purezza:>97.0%(GC)Colore e forma:Colorless to Almost colorless clear liquidPeso molecolare:182.07Benzofuran-2-boronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C8H7BO3Purezza:97.0 to 113.0 %Colore e forma:White to Light yellow to Light orange powder to crystalPeso molecolare:161.95Quinoline-8-boronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C9H8BNO2Purezza:97.0 to 112.0 %Colore e forma:White to Light yellow powder to crystalPeso molecolare:172.984-Fluoro-2-methoxyphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C7H8BFO3Purezza:97.0 to 111.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:169.954-Butoxy-2,3-difluorophenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C10H13BF2O3Purezza:97.0 to 109.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:230.02Borane - Tetrahydrofuran Complex (8.5% in Tetrahydrofuran, ca. 0.9mol/L) (stabilized with Sodium Borohydride)
CAS:Formula:BH3·C4H8OColore e forma:Colorless to Light yellow clear liquidPeso molecolare:85.94(S)-5,5-Diphenyl-2-methyl-3,4-propano-1,3,2-oxazaborolidine (ca. 1mol/L in Toluene)
CAS:Formula:C18H20BNOColore e forma:Colorless to Light yellow clear liquidPeso molecolare:277.175-Pyrimidylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C4H5BN2O2Purezza:95.0 to 117.0 %Colore e forma:White to Orange to Green powder to crystalPeso molecolare:123.914-Fluoro-2-(trifluoromethyl)phenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C7H5BF4O2Purezza:97.0 to 110.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:207.923-Benzyloxyphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C13H13BO3Colore e forma:White to Yellow to Orange powder to crystalPeso molecolare:228.052-Chloropyridine-5-boronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C5H5BClNO2Purezza:96.0 to 113.0 %Colore e forma:White to Light yellow powder to crystalPeso molecolare:157.364-Benzyloxy-2-fluorophenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C13H12BFO3Purezza:97.0 to 108.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:246.042-(4-Fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
CAS:Formula:C12H16BFO2Purezza:>98.0%(GC)(T)Colore e forma:White or Colorless to Light yellow to Light orange powder to lump to clear liquidPeso molecolare:222.074-[3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]pyridine
CAS:Formula:C17H20BNO2Purezza:>98.0%(GC)(T)Colore e forma:White to Light yellow powder to crystalPeso molecolare:281.16(Piperidinium-1-ylmethyl)trifluoroborate
CAS:Formula:C6H13BF3NPurezza:>96.0%(N)Colore e forma:White to Light yellow powder to crystalPeso molecolare:166.982-(9,9'-Spirobi[fluoren]-7-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
CAS:Formula:C31H27BO2Purezza:>98.0%(T)(HPLC)Colore e forma:White to Almost white powder to crystalPeso molecolare:442.373,5-Bis(trifluoromethyl)phenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C8H5BF6O2Purezza:95.0 to 108.0 %Colore e forma:White to Orange to Green powder to crystalPeso molecolare:257.931-Butyl-1-methylpyrrolidinium Tetrafluoroborate
CAS:Formula:C9H20BF4NPurezza:>98.0%(T)Colore e forma:White to Light yellow powder to crystalPeso molecolare:229.072,2'-Cyclopropylidenebis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane)
CAS:Formula:C15H28B2O4Purezza:>98.0%(GC)Colore e forma:White to Light yellow powder to crystalPeso molecolare:294.015-Chloro-2-thiopheneboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C4H4BClO2SPurezza:97.0 to 112.5 %Colore e forma:White to Light yellow powder to crystalPeso molecolare:162.394-Heptyloxyphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C13H21BO3Colore e forma:White to Almost white powder to crystalPeso molecolare:236.12Potassium Phenyltrifluoroborate
CAS:Formula:C6H5BF3KPurezza:>98.0%(T)(HPLC)Colore e forma:White to Almost white powder to crystalPeso molecolare:184.019-Anthraceneboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C14H11BO2Purezza:>98.0%(HPLC)Colore e forma:White to Orange to Green powder to crystalPeso molecolare:222.059-Phenylcarbazole-3-boronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C18H14BNO2Colore e forma:White to Light yellow powder to crystalPeso molecolare:287.134-Methoxy-3-(trifluoromethyl)phenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C8H8BF3O3Purezza:min. 98.0 area%(HPLC)Colore e forma:White to Almost white powder to crystalPeso molecolare:219.955,5-Dimethyl-2-phenyl-1,3,2-dioxaborinane
CAS:Formula:C11H15BO2Purezza:>98.0%(GC)(T)Colore e forma:White to Almost white powder to crystalPeso molecolare:190.05Cyclohexylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C6H13BO2Colore e forma:White to Orange to Green powder to crystalPeso molecolare:127.98[9-(Naphthalen-2-yl)-9H-carbazol-3-yl]boronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C22H16BNO2Colore e forma:White to Light yellow powder to crystalinePeso molecolare:337.194-Ethoxy-3-fluorophenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C8H10BFO3Purezza:97.0 to 111.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:183.972-Fluoro-6-methoxyphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C7H8BFO3Colore e forma:White to Almost white powder to crystalPeso molecolare:169.95Borane - tert-Butylamine Complex
CAS:Formula:BH3·C4H11NPurezza:>95.0%(T)Colore e forma:White to Almost white powder to crystalPeso molecolare:86.97Methyl 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate
CAS:Formula:C14H19BO4Purezza:>98.0%(GC)(T)Colore e forma:White to Almost white powder to crystalPeso molecolare:262.114-Ethoxy-2-methylphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C9H13BO3Purezza:97.0 to 112.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:180.013-(Methoxycarbonyl)phenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C8H9BO4Colore e forma:White to Light yellow powder to crystalPeso molecolare:179.97Dimethylamine Borane
CAS:Formula:C2H7N·BH3Purezza:>95.0%(T)Colore e forma:White powder to crystalPeso molecolare:58.922-(Hydroxymethyl)phenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C7H9BO3Purezza:97.0 to 113.5 %Colore e forma:White to Almost white powder to crystalPeso molecolare:151.964,4,5,5-Tetramethyl-2-(5-methylfuran-2-yl)-1,3,2-dioxaborolane
CAS:Formula:C11H17BO3Purezza:>97.0%(GC)(T)Colore e forma:White or Colorless to Yellow to Orange powder to lump to clear liquidPeso molecolare:208.062,4-Dichlorophenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C6H5BCl2O2Purezza:97.0 to 111.0 %Colore e forma:White to Light yellow powder to crystalPeso molecolare:190.81(-)-B-Chlorodiisopinocampheylborane (55-65% in Heptane, ca. 1.7mol/L)
CAS:Formula:C20H34BClColore e forma:Colorless to Almost colorless clear liquidPeso molecolare:320.75Tris(pentafluorophenyl)borane
CAS:Formula:C18BF15Purezza:>98.0%(NMR)Colore e forma:White to Gray to Brown powder to crystalPeso molecolare:511.98Potassium Cyclopropyltrifluoroborate
CAS:Formula:C3H5BF3KPurezza:>95.0%(T)Colore e forma:White to Almost white powder to crystalPeso molecolare:147.983-Chloro-2-fluorophenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C6H5BClFO2Colore e forma:White to Almost white powder to crystalPeso molecolare:174.362-Naphthaleneboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C10H9BO2Colore e forma:White to Light yellow powder to crystalPeso molecolare:171.99Potassium (4-Cyanophenyl)trifluoroborate
CAS:Formula:C7H4BF3KNPurezza:>95.0%(N)Colore e forma:White to Almost white powder to crystalPeso molecolare:209.023-Fluoro-4-formylphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C7H6BFO3Purezza:97.0 to 113.0 %Colore e forma:White to Light yellow powder to crystalPeso molecolare:167.93Potassium (Acetoxymethyl)trifluoroborate
CAS:Formula:C3H5BF3KO2Purezza:>96.0%(T)Colore e forma:White to Almost white powder to crystalPeso molecolare:179.971H-Pyrazole-4-boronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C3H5BN2O2Purezza:98.0 to 119.0 %Colore e forma:White to Orange to Green powder to crystalPeso molecolare:111.905-Chloro-2-fluorophenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C6H5BClFO2Purezza:97.0 to 112.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:174.369-Phenanthreneboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C14H11BO2Colore e forma:White to Light yellow to Light orange powder to crystalPeso molecolare:222.05Dimethyl Sulfide Borane
CAS:Formula:C2H6S·BH3Purezza:>90.0%(T)Colore e forma:Colorless to Light yellow clear liquidPeso molecolare:75.962-Aminoethyl Diphenylborinate
CAS:Formula:C14H16BNOPurezza:>98.0%(T)(HPLC)Colore e forma:White to Almost white powder to crystalPeso molecolare:225.102,5-Dimethylphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C8H11BO2Purezza:97.0 to 114.0 %Colore e forma:White to Light yellow powder to crystalPeso molecolare:149.989,10-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)anthracene
CAS:Formula:C26H32B2O4Purezza:>98.0%(GC)Colore e forma:White to Light yellow powder to crystalPeso molecolare:430.163-Carboxy-4-fluorophenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C7H6BFO4Purezza:97.0 to 110.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:183.933-[3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]pyridine
CAS:Formula:C17H20BNO2Purezza:>98.0%(GC)(T)Colore e forma:White to Orange to Green powder to crystalPeso molecolare:281.163-Chloro-4-methylphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C7H8BClO2Purezza:97.0 to 112.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:170.40Butylboronic Acid (contains varying amounts of Anhydride) [for Esterification]
CAS:Formula:C4H11BO2Colore e forma:White to Light yellow powder to crystalinePeso molecolare:101.94Ethyl 2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate
CAS:Formula:C15H21BO4Purezza:>98.0%(GC)Colore e forma:White to Almost white powder to crystalPeso molecolare:276.142,6-Difluorophenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C6H5BF2O2Colore e forma:White to Almost white powder to crystalPeso molecolare:157.91Dibenzothiophene-4-boronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C12H9BO2SPurezza:97.0 to 109.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:228.075-Formyl-2-methoxyphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C8H9BO4Purezza:97.0 to 112.0 %Colore e forma:Light orange to Yellow to Green powder to crystalPeso molecolare:179.972-Bromophenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C6H6BBrO2Purezza:97.0 to 110.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:200.83Trioctadecyl Borate
CAS:Formula:C54H111BO3Purezza:>97.0%(T)Colore e forma:White to Light yellow powder to crystalPeso molecolare:819.293,5-Dimethyl-4-propoxyphenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C11H17BO3Purezza:97.0 to 110.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:208.063-(tert-Butoxycarbonyl)phenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C11H15BO4Purezza:97.0 to 109.0 %Colore e forma:White to Almost white powder to crystalPeso molecolare:222.052-Methoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
CAS:Formula:C7H15BO3Purezza:>97.0%(GC)(T)Colore e forma:Colorless to Almost colorless clear liquidPeso molecolare:158.004-(Benzyloxycarbonyl)phenylboronic Acid (contains varying amounts of Anhydride)
CAS:Formula:C14H13BO4Colore e forma:White to Almost white powder to crystalPeso molecolare:256.062-Amino-4-methoxycarbonylphenylboronic acid, HCl
CAS:Formula:C8H11BClNO4Purezza:95%Colore e forma:SolidPeso molecolare:231.44122-(4-Methylpiperazino)pyrimidine-5-boronic acid pinacol ester
CAS:Formula:C15H25BN4O2Purezza:98%Colore e forma:SolidPeso molecolare:304.1956Boronic acid, B-[3-fluoro-4-(phenylmethoxy)phenyl]-
CAS:Formula:C13H12BFO3Purezza:97%Colore e forma:SolidPeso molecolare:246.0420Benzenemethanol, 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-
CAS:Formula:C13H19BO3Purezza:97%Colore e forma:SolidPeso molecolare:234.09922,2'-[1,1'-Biphenyl]-3,3'-diylbis[4,4,5,5-tetramethyl-1,3,2-dioxaborolane]
CAS:Formula:C24H32B2O4Purezza:97%Colore e forma:SolidPeso molecolare:406.13053-Borono-5-fluorobenzoic acid
CAS:Formula:C7H6BFO4Purezza:98%Colore e forma:SolidPeso molecolare:183.9295N-BOC-isoindoline-4-boronic acid, pinacol ester
CAS:Formula:C19H28BNO4Purezza:95%Colore e forma:SolidPeso molecolare:345.24094,4,5,5-Tetramethyl-2-(4-phenoxyphenyl)-1,3,2-dioxaborolane
CAS:Formula:C18H21BO3Purezza:97%Colore e forma:SolidPeso molecolare:296.16851-Methylpyrrole-3-boronic acid, pinacol ester
CAS:Formula:C11H18BNO2Purezza:97%Colore e forma:SolidPeso molecolare:207.07713,5-Dimethylpyrazole-4-boronic Acid Pinacol Ester
CAS:Formula:C11H19BN2O2Purezza:97%Colore e forma:SolidPeso molecolare:222.09181-Benzyl-1,2,3,6-tetrahydropyridine-4-boronic Acid Pinacol Ester
CAS:Formula:C18H26BNO2Purezza:95%Colore e forma:SolidPeso molecolare:299.21552-(3-(9,9-Dimethyl-9H-fluoren-2-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
CAS:Formula:C27H29BO2Purezza:97%Colore e forma:SolidPeso molecolare:396.3290Boronic acid, B-(4-methoxy-2,5-dimethylphenyl)-
CAS:Formula:C9H13BO3Purezza:97%Colore e forma:SolidPeso molecolare:180.00872-[9,9-dihexyl-7-(tetramethyl-1,3,2-dioxaborolan-2-yl)fluoren-2-yl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
CAS:Formula:C37H56B2O4Purezza:98%Colore e forma:SolidPeso molecolare:586.46014-(Morpholine-4-carbonyl)phenylboronic acid, pinacol ester
CAS:Formula:C17H24BNO4Purezza:98%Colore e forma:SolidPeso molecolare:317.18782-Fluoropyridine-5-boronic acid
CAS:Formula:C5H5BFNO2Purezza:97%Colore e forma:SolidPeso molecolare:140.90812-Chloro-6-methylpyridine-4-boronic acid, pinacol ester
CAS:Formula:C12H17BClNO2Purezza:97%Colore e forma:SolidPeso molecolare:253.53299-Phenyl-9H-carbazole-3-boronic acid
CAS:Formula:C18H14BNO2Purezza:97%Colore e forma:SolidPeso molecolare:287.12032,2'-Bi-1,3,2-dioxaborinane, 5,5,5',5'-tetramethyl-
CAS:Formula:C10H20B2O4Purezza:98%Colore e forma:SolidPeso molecolare:225.88544-(Morpholinomethyl)phenylboronic acid, pinacol ester
CAS:Formula:C17H26BNO3Purezza:95%Colore e forma:SolidPeso molecolare:303.2042Ref: IN-DA0033TP
1g25,00€5g31,00€10g53,00€1kgPrezzo su richiesta25g80,00€5kgPrezzo su richiesta100g161,00€250mg25,00€Boronic acid, B-9,9'-spirobi[9H-fluoren]-2-yl-
CAS:Formula:C25H17BO2Purezza:97%Colore e forma:SolidPeso molecolare:360.2123Pyrrolo[2,3-b]pyridine-5-boronic acid, pinacol ester
CAS:Formula:C13H17BN2O2Purezza:97%Colore e forma:SolidPeso molecolare:244.09732-Fluorobiphenyl-4-ylboronic acid
CAS:Formula:C12H10BFO2Purezza:98%Colore e forma:SolidPeso molecolare:216.01603-Ethoxycarbonylphenylboronic acid
CAS:Formula:C9H11BO4Purezza:98%Colore e forma:SolidPeso molecolare:193.9922
![4-[3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]pyridine](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2F3B%2Fthumb-webp%2FT3399.webp&w=3840&q=75)
![2-(9,9'-Spirobi[fluoren]-7-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2F3B%2Fthumb-webp%2FS0980.webp&w=3840&q=75)
![[9-(Naphthalen-2-yl)-9H-carbazol-3-yl]boronic Acid (contains varying amounts of Anhydride)](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2F3B%2Fthumb-webp%2FN1098.webp&w=3840&q=75)
![3-[3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]pyridine](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2F3B%2Fthumb-webp%2FT3313.webp&w=3840&q=75)
![Butylboronic Acid (contains varying amounts of Anhydride) [for Esterification]](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2F3B%2Fthumb-webp%2FB0529.webp&w=3840&q=75)
![Boronic acid, B-[3-fluoro-4-(phenylmethoxy)phenyl]-](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2FIN%2Fthumb-webp%2FDA0011L1.webp&w=3840&q=75)
![2,2'-[1,1'-Biphenyl]-3,3'-diylbis[4,4,5,5-tetramethyl-1,3,2-dioxaborolane]](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2FIN%2Fthumb-webp%2FDA003A2F.webp&w=3840&q=75)
![2-[9,9-dihexyl-7-(tetramethyl-1,3,2-dioxaborolan-2-yl)fluoren-2-yl]-4,4,5,5-tetramethyl-1,3,2-diox…](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2FIN%2Fthumb-webp%2FDA00BDX0.webp&w=3840&q=75)
![Boronic acid, B-9,9'-spirobi[9H-fluoren]-2-yl-](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2FIN%2Fthumb-webp%2FDA002NYV.webp&w=3840&q=75)
![Pyrrolo[2,3-b]pyridine-5-boronic acid, pinacol ester](/_next/image/?url=https%3A%2Fstatic.cymitquimica.com%2Fproducts%2FIN%2Fthumb-webp%2FDA003ND6.webp&w=3840&q=75)
