Kjeldahl Buffers and Reagents

Kjeldahl Buffers and Reagents

Buffers and reagents intended for use with the Kjeldahl method; the Kjeldahl method is an analytical chemistry procedure used for the quantitative determination of nitrogen contained in organic substances, ammonia and ammonium.
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1 – 30 of 42 results
1

FisherTab™ CT-37 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 3.5g K2SO4 + 0.4g CuSO4

Promotions are available
EDGE
CAS 7778-80-5
MDL Number MFCD00010981
Chemical Name or Material FisherTab™ CT-37 Kjeldahl Tablets
Assay Percent Range 90%
2

Kjel-Sorb™ Solution (Certified), Fisher Chemical™

CAS: 10043-35-3,7732-18-5 Molecular Formula: BH3O3 Molecular Weight (g/mol): 61.831 MDL Number: MFCD00011337 InChI Key: KGBXLFKZBHKPEV-UHFFFAOYSA-N PubChem CID: 7628 ChEBI: CHEBI:33118 IUPAC Name: boric acid SMILES: B(O)(O)O

Promotions are available
EDGE
PubChem CID 7628
CAS 10043-35-3,7732-18-5
Molecular Weight (g/mol) 61.831
ChEBI CHEBI:33118
MDL Number MFCD00011337
SMILES B(O)(O)O
IUPAC Name boric acid
InChI Key KGBXLFKZBHKPEV-UHFFFAOYSA-N
Molecular Formula BH3O3
3

FisherTab CT-AUTO Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 1.5g K2SO4 + 0.15g CuSO4

CAS 7778-80-5
MDL Number MFCD00010981
Chemical Name or Material FisherTab™ CT-AUTO Kjeldahl Tablets
Assay Percent Range 93%
4

FisherTab™ MT-37 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 3.5g K2SO4 + 0.175g HgO

CAS 21908-53-2
MDL Number MFCD03456795
Chemical Name or Material FisherTab™ MT-37 Kjeldahl Tablets
Assay Percent Range 95%
5

FisherTab™ ST-35 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 3.5g K2SO4 + 0.35g Se

CAS 7782-49-2
MDL Number MFCD03456801
Chemical Name or Material FisherTab™ ST-35 Kjeldahl Tablets
Assay Percent Range 99%
6

FisherTab™ TT-35 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 3.5g K2SO4 + 0.1g CuSO4 + 0.1g TiO2

Promotions are available
CAS 13463-67-7
MDL Number MFCD00010981
Chemical Name or Material FisherTab™ TT-35 Kjeldahl Tablets
Assay Percent Range 94%
7

FisherTab™ ST-AUTO Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 1.5g K2SO4 + 0.015g Se

CAS 7782-49-2
MDL Number MFCD03456802
Chemical Name or Material FisherTab™ ST-AUTO Kjeldahl Tablets
Assay Percent Range 99%
8

FisherTab™ TT-50 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 5g K2SO4 + 0.1g CuSO4 + 0.1g TiO2

CAS 13463-67-7
MDL Number MFCD00010981
Chemical Name or Material FisherTab™ TT-50 Kjeldahl Tablets
Assay Percent Range 94%
9

FisherTab™ TT-43 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 4.18g K2SO4 + 0.0025g CuSO4 + 0.15g TiO2

CAS 13463-67-7
MDL Number MFCD00010981
Chemical Name or Material FisherTab™ TT-43 Kjeldahl Tablets
Assay Percent Range 96%
10

FisherTab™ CT-50 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 5g K2SO4 + 0.15g CuSO4

CAS 7778-80-5
MDL Number MFCD00010981
Chemical Name or Material FisherTab™ CT-50 Kjeldahl Tablets
Assay Percent Range 97%
11

FisherTab™ TT-57 Kjeldahl Tablets, Fisher Chemical

Composition per tablet: 5.57g K2SO4 + 0.0033g CuSO4 + 0.2g TiO2

CAS 13463-67-7
MDL Number MFCD00010981
Chemical Name or Material FisherTab™ TT-57 Kjeldahl Tablets
Assay Percent Range 96%
12

BUCHI Activated Charcoal, 150 g
SDP

For the adsorption stage of the scrubber, holds back particles and enables the aerosols to recondensate.

13

BUCHI Boric Acid with Sher Indicator, pH 4.65
SDP

Boric Acid with Sher Indicator, pH adjusted to 4.65 ± 0.15 for pH or colorimetric titration.

CAS 76-60-8
Molecular Weight (g/mol) 61.83
Packaging Plastic Bottle
Chemical Name or Material Boric Acid with Sher Indicator
Quantity 5 L
Synonym Orthoboric Acid
Molecular Formula BH3O3
14

BUCHI Kjeldahl Tablets
SDP

Digestion aids for nitrogen determination.

Percent Purity Mixture
Packaging Plastic Container
Quantity 1000 Pk.
15

Sodium Hydroxide, For Kjeldahl Nitrogen, Certified, 40.0% (w/w) ±0.4% (w/w), LabChem™

CAS: 1310-73-2 Molecular Formula: HNaO Molecular Weight (g/mol): 39.997 InChI Key: HEMHJVSKTPXQMS-UHFFFAOYSA-M Synonym: Caustic Soda PubChem CID: 14798 ChEBI: CHEBI:32145 IUPAC Name: sodium;hydroxide SMILES: [OH-].[Na+]

PubChem CID 14798
CAS 1310-73-2
Molecular Weight (g/mol) 39.997
ChEBI CHEBI:32145
SMILES [OH-].[Na+]
Synonym Caustic Soda
IUPAC Name sodium;hydroxide
InChI Key HEMHJVSKTPXQMS-UHFFFAOYSA-M
Molecular Formula HNaO
16

Hydrochloric Acid, 0.1142 N, for Kjeldahl Analysis of Proteins, Ricca Chemical
SDP

CAS: 7647-01-0 Molecular Formula: ClH Molecular Weight (g/mol): 36.46 MDL Number: MFCD00011324 InChI Key: VEXZGXHMUGYJMC-UHFFFAOYSA-N PubChem CID: 313 ChEBI: CHEBI:17883 IUPAC Name: hydrogen chloride SMILES: [H+].[Cl-]

PubChem CID 313
CAS 7647-01-0
Molecular Weight (g/mol) 36.46
ChEBI CHEBI:17883
MDL Number MFCD00011324
SMILES [H+].[Cl-]
IUPAC Name hydrogen chloride
InChI Key VEXZGXHMUGYJMC-UHFFFAOYSA-N
Molecular Formula ClH
17

Boric Acid, 2% (w/v) with Mixed Indicator, Ricca Chemical
SDP

CAS: 10043-35-3 Molecular Formula: BH3O3 Molecular Weight (g/mol): 61.83 InChI Key: KGBXLFKZBHKPEV-UHFFFAOYSA-N Synonym: orthoboric acid,boracic acid,borofax,boron hydroxide,boron trihydroxide,three elephant,basilit b,Tris-borate-EDTA,h3bo3,flea prufe PubChem CID: 7628 ChEBI: CHEBI:33118 IUPAC Name: boric acid SMILES: OB(O)O

PubChem CID 7628
CAS 10043-35-3
Molecular Weight (g/mol) 61.83
ChEBI CHEBI:33118
SMILES OB(O)O
Synonym orthoboric acid,boracic acid,borofax,boron hydroxide,boron trihydroxide,three elephant,basilit b,Tris-borate-EDTA,h3bo3,flea prufe
IUPAC Name boric acid
InChI Key KGBXLFKZBHKPEV-UHFFFAOYSA-N
Molecular Formula BH3O3
18

Digestion Reagent, with Mercury Catalyst, Ricca Chemical
SDP

For Analysis of Nitrogen (Kjeldahl)

Name Note With Mercury Catalyst
CAS 21908-53-2
Color Colorless
Physical Form Liquid
Packaging Natural Poly Bottle
CAS Min % 0.13
Chemical Name or Material Digestion Reagent
CAS Max % 0.14
19

Sodium Hydroxide-Sulfide, Ricca Chemical
SDP

CAS: 1310-73-2 Molecular Formula: HNaO Molecular Weight (g/mol): 39.997 InChI Key: HEMHJVSKTPXQMS-UHFFFAOYSA-M PubChem CID: 14798 ChEBI: CHEBI:32145 IUPAC Name: sodium;hydroxide SMILES: [OH-].[Na+]

PubChem CID 14798
CAS 1310-73-2
Molecular Weight (g/mol) 39.997
ChEBI CHEBI:32145
SMILES [OH-].[Na+]
IUPAC Name sodium;hydroxide
InChI Key HEMHJVSKTPXQMS-UHFFFAOYSA-M
Molecular Formula HNaO
20

Digestion Reagent, with Copper Catalyst, Ricca Chemical
SDP

For Analysis of Nitrogen (Kjeldahl)

Name Note With Copper Catalyst
CAS 7758-99-8
Color Blue
Physical Form Liquid
Packaging Natural Poly Bottle
CAS Min % 0.51
Chemical Name or Material Digestion Reagent
CAS Max % 0.53
21

Sodium Hydroxide-Thiosulfate, 50%-2.5% (w/v), Ricca Chemical
SDP

CAS: 10102-17-7 Molecular Formula: HNaO Molecular Weight (g/mol): 39.997 InChI Key: HEMHJVSKTPXQMS-UHFFFAOYSA-M PubChem CID: 14798 ChEBI: CHEBI:32145 IUPAC Name: sodium;hydroxide SMILES: [OH-].[Na+]

PubChem CID 14798
CAS 10102-17-7
Molecular Weight (g/mol) 39.997
ChEBI CHEBI:32145
SMILES [OH-].[Na+]
IUPAC Name sodium;hydroxide
InChI Key HEMHJVSKTPXQMS-UHFFFAOYSA-M
Molecular Formula HNaO
22

Salicylate/Nitroprusside Solution, EPA for Kjeldahl Nitrogen Determination, Ricca Chemical
SDP

CAS 13755-38-9
Physical Form Liquid
CAS Min % 0.03
Chemical Name or Material Salicylate / Nitroprusside Solution
CAS Max % 0.03
23

Sulfuric Acid, 0.1142 N, Ricca Chemical
SDP

CAS: 7664-93-9 Molecular Formula: H2O4S Molecular Weight (g/mol): 98.072 InChI Key: QAOWNCQODCNURD-UHFFFAOYSA-N PubChem CID: 1118 ChEBI: CHEBI:26836 IUPAC Name: sulfuric acid SMILES: OS(=O)(=O)O

PubChem CID 1118
CAS 7664-93-9
Molecular Weight (g/mol) 98.072
ChEBI CHEBI:26836
SMILES OS(=O)(=O)O
IUPAC Name sulfuric acid
InChI Key QAOWNCQODCNURD-UHFFFAOYSA-N
Molecular Formula H2O4S
24

Kjeltabs S-3.5, Foss™

CAS: 7782-49-2 Molecular Formula: Se Molecular Weight (g/mol): 78.97 MDL Number: MFCD00134090 MFCD00011224 InChI Key: BUGBHKTXTAQXES-UHFFFAOYSA-N PubChem CID: 6326970 ChEBI: CHEBI:27568 IUPAC Name: selenium SMILES: [Se]

PubChem CID 6326970
CAS 7782-49-2
Molecular Weight (g/mol) 78.97
ChEBI CHEBI:27568
MDL Number MFCD00134090 MFCD00011224
SMILES [Se]
IUPAC Name selenium
InChI Key BUGBHKTXTAQXES-UHFFFAOYSA-N
Molecular Formula Se
25

Kjeltabs Cu-1.5, Foss™

CAS: 7758-99-8 Molecular Formula: CuH10O9S Molecular Weight (g/mol): 249.68 MDL Number: MFCD00149681 InChI Key: JZCCFEFSEZPSOG-UHFFFAOYSA-L PubChem CID: 24463 ChEBI: CHEBI:31440 IUPAC Name: copper(2+) pentahydrate sulfate SMILES: O.O.O.O.O.[Cu++].[O-]S([O-])(=O)=O

PubChem CID 24463
CAS 7758-99-8
Molecular Weight (g/mol) 249.68
ChEBI CHEBI:31440
MDL Number MFCD00149681
SMILES O.O.O.O.O.[Cu++].[O-]S([O-])(=O)=O
IUPAC Name copper(2+) pentahydrate sulfate
InChI Key JZCCFEFSEZPSOG-UHFFFAOYSA-L
Molecular Formula CuH10O9S
26

Kjeltabs CT (Copper and Titanium) - 5, Foss™

Composition per tablet: 5g K2SO4 + 0.15g CuSO4·5H2O + 0.15g TiO2

CAS 7758-99-8
Physical Form Flat Round Speckled Tablets
Chemical Name or Material Copper and Titanium Kjeltabs
27

KjTabs VKPC - Kjeldahl Catalyst Tablets, Velp Scientifica™
SDP

KjTabsTM VKPC Kjeldahl Catalyst Tablets are ideal when a high amount of copper is required. The perfect solutions to speed up the digestion of your samples.

28

KjTabs VW - Kjeldahl Catalyst Tablets, Velp Scientifica™
SDP

KjTabsTM VW Kjeldahl Catalyst Tablets are ideal for applications based on the Wieninger method. The perfect solutions to speed up the digestion of your samples.

29

KjTabs VCM - Kjeldahl Catalyst Tablets, Velp Scientifica™
SDP

KjTabsTM VCM are universally applicable Kjeldahl Catalyst Tablets with a low copper content. The perfect solutions to speed up the digestion of your samples.

30

Kjeltabs S-5, Foss™

CAS: 7782-49-2 Molecular Formula: Se Molecular Weight (g/mol): 78.97 MDL Number: MFCD00134090 MFCD00011224 InChI Key: BUGBHKTXTAQXES-UHFFFAOYSA-N PubChem CID: 6326970 ChEBI: CHEBI:27568 IUPAC Name: selenium SMILES: [Se]

PubChem CID 6326970
CAS 7782-49-2
Molecular Weight (g/mol) 78.97
ChEBI CHEBI:27568
MDL Number MFCD00134090 MFCD00011224
SMILES [Se]
IUPAC Name selenium
InChI Key BUGBHKTXTAQXES-UHFFFAOYSA-N
Molecular Formula Se