Buffers and Standards
Buffers and Standards
Hydrogen ion buffers comprising a mixture of a weak acid and its conjugate base or vice-versa and used to stabilize pH; also diluents, washing solutions, and standard-value solutions used for a broad array of scientific calibration purposes.
The buffers used to calibrate pH meters may be certified and/or traceable to the National Institute of Standards and Technology (NIST). These buffers may also be color-coded for easy identification:
- Red: pH 4.0
- Yellow: pH 7.0
- Blue: pH 10.0
Fisher Science Education™ Potassium Iodide Solution 0.5M

CAS: 1310-58-3,7732-18-5,7681-11-0,144-55-8 Molecular Formula: IK Molecular Weight (g/mol): 166.003 InChI Key: NLKNQRATVPKPDG-UHFFFAOYSA-M Synonym: potassium iodide,potassium iodide ki,pima,kali iodide,thyro-block,knollide,kisol,asmofug e,potassium diiodide,potassium monoiodide PubChem CID: 4875 ChEBI: CHEBI:8346 IUPAC Name: potassium;iodide SMILES: [K+].[I-]

Fisher Science Education™ Sodium Hypochlorite Solution, 13%

CAS: 7681-52-9 Molecular Formula: ClNaO Molecular Weight (g/mol): 74.439 InChI Key: SUKJFIGYRHOWBL-UHFFFAOYSA-N Synonym: sodium hypochlorite,antiformin,sodium oxychloride,chlorox,clorox,javex,javelle water,hypochlorous acid, sodium salt,hypochlorite sodium,carrel-dakin solution PubChem CID: 23665760 ChEBI: CHEBI:32146 IUPAC Name: sodium;hypochlorite SMILES: [O-]Cl.[Na+]

Fisher Science Education™ Hydrogen Peroxide Solution, 3%

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Synonym: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO

Fisher Science Education™ Silver Nitrate Solution, 1.0N

CAS: 7761-88-8 Molecular Formula: AgNO3 Molecular Weight (g/mol): 169.87 MDL Number: MFCD00003414 InChI Key: SQGYOTSLMSWVJD-UHFFFAOYSA-N Synonym: silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol PubChem CID: 24470 ChEBI: CHEBI:32130 IUPAC Name: silver(1+) nitrate SMILES: [Ag+].[O-][N+]([O-])=O
Fisher Science Education™ Sodium Silicate Solution, 37%

CAS: 7732-18-5 Molecular Formula: H10Na2O8Si Molecular Weight (g/mol): 212.14 MDL Number: MFCD00003492 InChI Key: ADPGKKZKGXANON-UHFFFAOYSA-N Synonym: sodium metasilicate,sodium silicate,waterglass,water glass,sodium siliconate,sodium polysilicate,sodium sesquisilicate,sodium silicate glass,sodium silicate solution,sodium water glass PubChem CID: 23266 ChEBI: CHEBI:60720 IUPAC Name: disodium oxosilanebis(olate) pentahydrate SMILES: O.O.O.O.O.[Na+].[Na+].[O-][Si]([O-])=O
Fisher Science Education™ Tris(hydroxymethyl) Aminomethane

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N Synonym: THAM,Tris PubChem CID: 6503 ChEBI: CHEBI:9754 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol SMILES: C(C(CO)(CO)N)O
Fisher Science Education™ Potassium Nitrite Solution, 0.1M

CAS: 7757-79-1,7732-18-5 Molecular Formula: KNO3 Molecular Weight (g/mol): 101.102 InChI Key: FGIUAXJPYTZDNR-UHFFFAOYSA-N Synonym: potassium nitrate,saltpeter,nitre,nitrate of potash,vicknite,nitric acid potassium salt,nitric acid, potassium salt,saltpetre,kaliumnitrat,kalii nitras PubChem CID: 24434 ChEBI: CHEBI:63043 IUPAC Name: potassium;nitrate SMILES: [N+](=O)([O-])[O-].[K+]
Fisher Science Education™ Potassium Hydroxide Solution, 0.1M

CAS: 1310-58-3,7732-18-5 Molecular Formula: HKO Molecular Weight (g/mol): 56.105 InChI Key: KWYUFKZDYYNOTN-UHFFFAOYSA-M Synonym: potassium hydroxide,caustic potash,potash lye,potassium hydrate,hydroxyde de potassium,potassa,potasse caustique,potassium hydroxide k oh,potassium hydroxide solution,caswell no. 693 PubChem CID: 14797 ChEBI: CHEBI:32035 IUPAC Name: potassium;hydroxide SMILES: [OH-].[K+]
Fisher Science Education™ Potassium Thiocyanate Solution, 0.1M

CAS: 7732-18-5,333-20-0 Molecular Formula: CKNS Molecular Weight (g/mol): 97.176 InChI Key: ZNNZYHKDIALBAK-UHFFFAOYSA-M Synonym: potassium thiocyanate,potassium rhodanate,potassium rhodanide,rodanca,potassium sulfocyanate,rhodanide,rhocya,potassium thiocyanide,kscn,thiocyanic acid, potassium salt PubChem CID: 516872 ChEBI: CHEBI:30951 IUPAC Name: potassium;thiocyanate SMILES: C(#N)[S-].[K+]
Fisher Science Education™ Potassium Permanganate Solution, 0.01M

CAS: 7732-18-5,7722-64-7 Molecular Formula: KMnO4 Molecular Weight (g/mol): 158.032 InChI Key: VZJVWSHVAAUDKD-UHFFFAOYSA-N Synonym: potassium permanganate,chameleon mineral,condy's crystals,argucide,cairox,permanganate of potash,insta-perm,walko tablets,algae-k,solo san soo PubChem CID: 516875 IUPAC Name: potassium;permanganate SMILES: [O-][Mn](=O)(=O)=O.[K+]
Fisher Science Education™ Sodium Thiosulfate Solution, 0.1M

CAS: 10102-17-7,1303-96-4,7732-18-5 Molecular Formula: H10Na2O8S2 Molecular Weight (g/mol): 248.172 InChI Key: PODWXQQNRWNDGD-UHFFFAOYSA-L Synonym: sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate PubChem CID: 61475 ChEBI: CHEBI:32150 IUPAC Name: disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;pentahydrate SMILES: O.O.O.O.O.[O-]S(=O)(=S)[O-].[Na+].[Na+]
Fisher Science Education™ Copper (II) Chloride Solution, 1M

CAS: 10125-13-0 Molecular Formula: Cl2CuH4O2 Molecular Weight (g/mol): 170.48 MDL Number: MFCD00149674 InChI Key: MPTQRFCYZCXJFQ-UHFFFAOYSA-L Synonym: coppertrace,copper ii chloride dihydrate,copper chloride dihydrate,caswell no. 235a,copper 2+ chloride dihydrate,cupric chloride usp,copper chloride cucl2 , dihydrate,epa pesticide chemical code 023701 PubChem CID: 61482 ChEBI: CHEBI:86318 IUPAC Name: copper(2+) dihydrate dichloride SMILES: O.O.[Cl-].[Cl-].[Cu++]
Fisher Science Education™ Hydrogen Peroxide, 30% Solution

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Synonym: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO
Fisher Science Education™ Sodium Chloride Solution 0.5M

CAS: 7732-18-5,7647-14-5 Molecular Formula: ClNa Molecular Weight (g/mol): 58.44 MDL Number: MFCD00003477 InChI Key: FAPWRFPIFSIZLT-UHFFFAOYSA-M Synonym: sodium chloride,salt,table salt,halite,saline,rock salt,common salt,sodium chloride nacl,dendritis,purex PubChem CID: 5234 ChEBI: CHEBI:26710 IUPAC Name: sodium chloride SMILES: [Na+].[Cl-]
Fisher Science Education™ Sodium Sulfate Solution, 0.1M

CAS: 7732-18-5,7757-82-6 Molecular Formula: Na2O4S Molecular Weight (g/mol): 142.036 InChI Key: PMZURENOXWZQFD-UHFFFAOYSA-L Synonym: sodium sulfate,disodium sulfate,salt cake,thenardite,sodium sulfate anhydrous,sodium sulphate,sodium sulfate, anhydrous,sulfuric acid disodium salt,disodium sulphate,sodium sulfate 2:1 PubChem CID: 24436 ChEBI: CHEBI:32149 IUPAC Name: disodium;sulfate SMILES: [O-]S(=O)(=O)[O-].[Na+].[Na+]
Fisher Science Education™ Sodium Chloride Solution 1M

CAS: 7647-14-5,7732-18-5 Molecular Formula: ClNa Molecular Weight (g/mol): 58.44 MDL Number: MFCD00003477 InChI Key: FAPWRFPIFSIZLT-UHFFFAOYSA-M Synonym: sodium chloride,salt,table salt,halite,saline,rock salt,common salt,sodium chloride nacl,dendritis,purex PubChem CID: 5234 ChEBI: CHEBI:26710 IUPAC Name: sodium chloride SMILES: [Na+].[Cl-]
Fisher Science Education™ Sodium Sulfide Solution, 0.1M

CAS: 7732-18-5,1313-84-4