S I G M A - A L D R I C H Acids & Bases
Sigma-Aldrich Acids & Bases
Sigma-Aldrich’s ACS reagents meet or exceed the specifications set by the
American Chemical Society. They can be used for ACS applications or for general
procedures that require stringent quality specifications.
Sigma-Aldrich is the premier brand for all your inorganic bases. We have a large
portfolio of inorganic bases and they are available in all purity grades to meet your
application needs.
Sigma-Aldrich provides a vast array of common organic and inorganic acids. Since
most inorganic acids can be highly corrosive, accidents involving a spill can be
catastrophic. However, one of the salient features of some of our products is that
Sigma-Aldrich® provides certain inorganic acids in shatter-resistant, high-Density
polyethylene (HDPE) bottles. This packaging helps to avoid some of the shock from
accidentally dropping the bottle and helps to contain the spill. Other advantages to
our HDPE bottles are that they are recyclable and can afford some inorganic acids
to be shipped in case packs.
AC ID / BA SE
DES C RI P TI ON
Ammonium Hydroxide
ACS Reagent / Base
2
Potassium Hydroxide
ACS reagent, ≥85%, pellets
3
Sodium Hydroxide
Solution / Base
4
Sodium Hydroxide
Pellets / Base
5
Hydrochloric Acid
ACS Reagent / Acid
6-7
Nitric Acid
ACS Reagent / Acid
8
Sulfuric Acid
ACS Reagent / Acid
9
Trichloroacetic Acid
ACS Reagent / Acid
10
© 2 0 1 4 C h rom Te c h , In c .
P rod u c t n a m e s a re tra d e m a r ks o r reg ist ered
t r a d e m a rks of the i r re sp e c ti ve co mpanies
Pub . No . : 0 3 0 0 0
PA G E
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S I G M A - A L D R I C H Bases
Ammonium hydroxide solution
ACS reagent, 28.0-30.0% NH3 basis
NH4OH
CAS Number 1336-21-6 | Linear Formula NH4OH | Molecular Weight 35.05 | Beilstein Registry Number 3587154
MDL Number MFCD00066650 | PubChem Substance ID 24853221
Ammonia is one of the top ten inorganic chemicals produced in the United Sates;
annual production is approximately 35 billion pounds. Ammonia is used as a
fertilizer directly or in the manufacture of fertilizers, explosives and a huge range of
materials. Ammonium hydroxide is widely used as a buffer (as ammonium acetate
or as ammonium carbonate). These buffers are volatile and can be removed from
protein solutions by lyophilization, leaving salt-free solids. As an ACS Reagent
(American Chemical Society), this product meets the requirements.
Ammonium hydroxide has a shelf-life of two years if stored at room temperature,
but should be stored tightly sealed in a vented cabinet away from acids. Over time,
the concentration may decrease due to evaporation of the gas from the solution. For
critical applications, it may be advisable to store frequently opened containers at 2-8 °C.
Synonym: Ammonia aqueous, Ammonia water
S P EC I FI C ATI ONS
Grade:
Assay:
Autoignition Temp.:
Expl. Lim.:
Impurities:
Ign. Residue:
Density:
Anion Traces:
Cation Traces:
ACS reagent
28.0-30.0% NH3 basis
1204 °F
27 %
MnO4- reducers, passes test
≤0.002% CO2
≤0.002%
0.9 g/mL at 25 °C(lit.)
chloride (Cl-): ≤0.5 ppm
nitrate (NO3-): ≤2 ppm
phosphate (PO43-): ≤2 ppm
sulfate (SO42-): ≤2 ppm
Fe: ≤0.2 ppm
heavy metals (as Pb): ≤0.5 ppm
AM M ONI U M HY DROX I DE O R D E R IN G IN F O R M AT IO N
PART N O - PA C K S I ZE
G R A DE
CON TAIN ER
221228-25ML-A
ACS reagent, 28.0 – 30.0% NH3 basis
poly bottle
221228-100ML-A
ACS reagent, 28.0 – 30.0% NH3 basis
poly bottle
221228-12X100ML-A
ACS reagent, 28.0 – 30.0% NH3 basis
poly bottle
221228-500ML-A
ACS reagent, 28.0 – 30.0% NH3 basis
poly bottle
221228-6X500ML-A
ACS reagent, 28.0 – 30.0% NH3 basis
poly bottle
221228-6X500ML-GLA
ACS reagent, 28.0 – 30.0% NH3 basis
glass bottle
221228-1L-A
ACS reagent, 28.0 – 30.0% NH3 basis
poly bottle
221228-2.5L-A
ACS reagent, 28.0 – 30.0% NH3 basis
poly bottle
221228-6X2.5L-A
ACS reagent, 28.0 – 30.0% NH3 basis
poly bottle
For larger volumes or bulk orders, contact sales at Chrom Tech for pricing.
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S I G M A - A L D R I C H Acids
Potassium hydroxide
ACS reagent, ≥85%, pellets
KOH
CAS Number 1310-58-3 | Linear Formula KOH | Molecular Weight 56.11 | EC Number 215-181-3
MDL Number MFCD00003553 | PubChem Substance ID 24853244
Potassium hydroxide (KOH) is a caustic reagent that is widely used to neutralize
acids and prepare potassium salts of reagents. It is used in a variety of large-scale
applications, such as the manufacture of soap, the mercerizing of cotton, electroplating,
photoengraving, and lithography.
Synonym: Caustic potash
S P EC I FI C ATI ONS
Grade:
Vapor Pressure:
Assay:
Impurities:
ACS reagent
1 mmHg ( 719 °C)
≥85%
≤0.001% N compounds
≤2.0% K2CO3
10-15% water
MP: 361 °C(lit.)
Anion Traces: chloride (Cl-): ≤0. ppm
phosphate (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.003%
Cation Traces: Ca: ≤0.005%
Fe: ≤0.001%
Mg: ≤0.002%
Na: ≤0.05%
Ni: ≤0.001%
heavy metals (as Pb): ≤0.001%
P OTAS S I U M HY DROX I DE O R D E R IN G IN F O R M AT IO N
PART N O - PA C K S I ZE
G R A DE
CON TAIN ER
221473-25G
ACS reagent, ≥85%, pellets
poly bottle
221473-500G
ACS reagent, ≥85%, pellets
poly bottle
221473-6X500G
ACS reagent, ≥85%, pellets
poly bottle
221473-1KG
ACS reagent, ≥85%, pellets
poly bottle
221473-2.5KG
ACS reagent, ≥85%, pellets
poly bottle
221473-4X2.5KG
ACS reagent, ≥85%, pellets
poly bottle
221473-12KG
ACS reagent, ≥85%, pellets
fiber drum
For larger volumes or bulk orders, contact sales at Chrom Tech for pricing.
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S I G M A - A L D R I C H Bases
Sodium hydroxide solution
50% solution in H2O
NaOH
CAS Number 1310-73-2 | Linear Formula NaOH | Molecular Weight 40.00 | MDL Number MFCD00003548
PubChem Substance ID 24866001
Sodium hydroxide (NaOH) is a caustic reagent that is widely used to neutralize
acids and prepare sodium salts of reagents. It is also used in a variety of largescale
applications, such as pulp and paper manufacturing, the manufacture of soap and
detergents, and water treatment.
Sodium hydroxide stock solutions should be stored in plastic containers. Glass
containers should be completely avoided in the preparation and storage of sodium
hydroxide solutions. For volumetric NaOH solutions, it is necessary to protect them from
air to avoid formation of carbonate in solution.
Synonym: caustic soda, soda lye
S P EC I FI C ATI ONS
Vapor Pressure: 3 mmHg ( 37 °C)
Concentration: 50% in H2O
Density: 1.515 g/mL at 25 °C
S ODI U M HY DROX I DE OR D E R IN G IN F O R M AT IO N
PART N O - PA C K S I ZE
G R A DE
CON TAIN ER
415413-25ML
50% solution in H2O
poly bottle
415413-100ML
50% solution in H2O
poly bottle
415413-500ML
50% solution in H2O
poly bottle
415413-1L
50% solution in H2O
poly bottle
415413-4L
50% solution in H2O
poly drum
415413-18L
50% solution in H2O
poly drum
For larger volumes or bulk orders, contact sales at Chrom Tech for pricing.
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Bases S I G M A - A L D R I C H
Sodium hydroxide
ACS reagent, ≥97.0%, pellets
NaOH
CAS Number 1310-73-2 | Linear Formula NaOH | Molecular Weight 40.00 | EC Number 215-185-5
MDL Number MFCD00003548 | PubChem Substance ID 24853242
This product is in the form of pellets. It is designated as ACS Reagent grade and
meets the specifications of the American Chemical Society (ACS) for reagent
chemicals. Sodium hydroxide (NaOH) is a caustic reagent that is widely used to
neutralize acids and prepare sodium salts of reagents. It is also used in a variety of
largescale applications, such as pulp and paper manufacturing, the manufacture of
soap and detergents, and water treatment.
Sodium hydroxide stock solutions should be stored in plastic containers. Glass
containers should be completely avoided in the preparation and storage of sodium
hydroxide solutions. For volumetric NaOH solutions, it is necessary to protect them from
air to avoid formation of carbonate in solution.
Synonym: caustic soda, soda lye
S P EC I FI C ATI ONS
Grade: ACS reagent
Vapor Density: >1 (vs air)
Vapor Pressure: <18 mmHg ( 20 °C)
3 mmHg ( 37 °C)
Assay: ≥97.0%
Impurities: ≤0.001% N compounds
≤0.02% NH4OH ppt.
≤1.0% Na2CO3
MP: 318 °C(lit.)
Anion Traces: chloride (Cl-): ≤0.005%
phosphate (PO43-): ≤0.001%
sulfate (SO42-): ≤0.003%
Cation Traces: Fe: ≤0.001%
Hg: ≤0.1 ppm
K: ≤0.02%
Ni: ≤0.001%
heavy metals (as Ag): ≤0.002%
S ODI U M HY DROX I DE ORD E R IN G IN F O R M AT IO N
PART N O - PA C K S I ZE
G R A DE
CON TAIN ER
221465-25G
ACS reagent, ≥97.0%, pellets
poly bottle
221465-500G
ACS reagent, ≥97.0%, pellets
poly bottle
221465-6X500G
ACS reagent, ≥97.0%, pellets
poly bottle
221465-2.5KG
ACS reagent, ≥97.0%, pellets
poly bottle
221465-12KG
ACS reagent, ≥97.0%, pellets
poly drum
221465-50KG
ACS reagent, ≥97.0%, pellets
poly drum
For larger volumes or bulk orders, contact sales at Chrom Tech for pricing.
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S I G M A - A L D R I C H Acids
Hydrochloric acid
ACS reagent, 37%
CAS Number 7647-01-0 | Empirical Formula (Hill Notation) HCl | Molecular Weight 36.46
Beilstein Registry Number 1098214 | EC Number 231-595-7 | MDL Number MFCD00011324
PubChem Substance ID 24855631
HCl
Hydrochloric acid is a clear colorless liquid which is a solution of hydrogen chloride
gas dissolved in water. Reagent grade hydrochloric acid certified by the American
Chemical Society (ACS) must assay between 36.5 and 38.0% HCl (titration) and
meet ACS criteria regarding trace impurities.
The product is stable at room temperature if kept sealed and away from bases and
metals. Solubility of HCl gas decreases somewhat with increased temperature. The
solution may develop a yellowish color with time due to traces of iron, chlorine or
organic matter.
Synonym: hydrogen chloride solution, muriatic acid
S P EC I FI C ATI ONS
Grade: ACS reagent
Vapor Density: 1.3 (vs air)
Vapor Pressure: 3.23 psi ( 21.1 °C)
7.93 psi ( 37.7 °C)
Assay: 36.5-38.0% (ACS specification)
37%
Impurities: ≤1 ppm free chlorine
≤5 ppm extractable organic substances
Ign. Residue: ≤5 ppm
Color: APHA: ≤10, free from suspended matter
or sediment
BP: >100 °C(lit.)
Density: 1.2 g/mL at 25 °C(lit.)
Anion Traces: bromide (Br-): ≤0.005%
sulfate (SO42-): ≤1 ppm
sulfite (SO32-): ≤1 ppm
Cation Traces: As: ≤0.01 ppm
Fe: ≤0.2 ppm
NH4+: ≤3 ppm
heavy metals (as Pb): ≤1 ppm
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Acids S I G M A - A L D R I C H
Hydrochloric acid (continued)
HY DROC HLORI C AC I D OR D E R IN G IN F O R M AT IO N
PART N O - PA C K S I ZE
G R A DE
CON TAIN ER
258148-25ML
ACS reagent, 37%
glass bottle
258148-100ML
ACS reagent, 37%
glass bottle
258148-4X100ML
ACS reagent, 37%
glass bottle
258148-12X100ML
ACS reagent, 37%
glass bottle
258148-500ML
ACS reagent, 37%
poly bottle
258148-500ML-GL
ACS reagent, 37%
glass bottle
258148-6X500ML
ACS reagent, 37%
poly bottle
258148-6X500ML-GL
ACS reagent, 37%
glass bottle
258148-2.5L
ACS reagent, 37%
poly bottle
258148-2.5L-GL
ACS reagent, 37%
glass bottle
258148-6X2.5L
ACS reagent, 37%
poly bottle
258148-6X2.5L-GL
ACS reagent, 37%
glass bottle
258148-4L
ACS reagent, 37%
poly bottle
258148-4X4L
ACS reagent, 37%
poly bottle
For larger volumes or bulk orders, contact sales at Chrom Tech for pricing.
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S I G M A - A L D R I C H Acids
Nitric acid
ACS reagent, 70%
HNO3
CAS Number 7697-37-2 | Empirical Formula (Hill Notation) HNO3 | Molecular Weight 63.01 | EC Number 231-714-2
MDL Number MFCD00011349 | PubChem Substance ID 24867421
S P EC I FI C ATI ONS
Grade: ACS reagent
Vapor Pressure: 8 mmHg ( 20 °C)
Assay: 68.0-70.0% (ACS specification)
70%
Ign. Residue: ≤5 ppm
Color: APHA: ≤10
BP: 120.5 °C(lit.)
Density: 1.413 g/mL at 20 °C(lit.)
Anion Traces: chloride (Cl-): ≤0.5 ppm
sulfate (SO42-): ≤1 ppm
Cation Traces: As: ≤0.01 ppm
Fe: ≤0.2 ppm
heavy metals (as Pb): ≤0.2 pp
NI TRI C AC I D ORDERIN G IN F O R M AT IO N
PART N O - PA C K S I ZE
G R A DE
CON TAIN ER
438073-500ML
ACS reagent, 70%
glass bottle
438073-6X500ML
ACS reagent, 70%
PVC coated
438073-2.5L
ACS reagent, 70%
glass bottle
438073-6X2.5L
ACS reagent, 70%
PVC coated
For larger volumes or bulk orders, contact sales at Chrom Tech for pricing.
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S I G M A - A L D R I C H Acids
Sulfuric acid
ACS reagent, 95.0 – 98.0%
H2SO4
CAS Number 7664-93-9 | Linear Formula H2SO4 | Molecular Weight 98.08 | Beilstein Registry Number 2037554
EC Number 231-639-5 | MDL Number MFCD00064589 | PubChem Substance ID 24855628
Sulfuric acid has a very high affinity for water, and can be used as a drying agent for air
and many organic materials. It will remove the elements of water from wood or sugar,
charring them. Sulfuric acid is widely used commercially in the manufacture of fertilizers,
metal treatments, car batteries, etc. It is the top-selling inorganic chemical in the United
States, produced in excess of 90 billion pounds annually.
As an ACS Reagent, this product meets or exceeds limits set for trace impurities, and
assays between 95 and 98%, based on test methods described by the American
Chemical Society.
Synonym: Oil of vitriol; dihydrogen sulfate; battery acid
S P EC I FI C ATI ONS
Grade:
Vapor Density:
Vapor Pressure:
Assay:
Ign. Residue:
Color:
BP:
Density:
Anion Traces:
ACS reagent
<0.3 (25 °C, vs air)
1 mmHg ( 146 °C)
95.0 – 98.0%
≤5 ppm
APHA: ≤10
~290 °C(lit.)
1.840 g/mL at 25 °C(lit.)
MnO4- reducers: ≤2 ppm
chloride (Cl-): ≤0.2 ppm
nitrate (NO3-): ≤0.5 ppm
Cation Traces: As: ≤0.01 ppm
Fe: ≤0.2 ppm
Hg: ≤5 ppb
NH4+: ≤2 ppm
heavy metals (as Pb): ≤1 ppm
S U LFU RI C AC I D ORDER IN G IN F O R M AT IO N
PART N O - PA C K S I ZE
G R A DE
CON TAIN ER
258105-100ML
ACS reagent, 95.0 – 98.0%
glass bottle
258105-12X100ML
ACS reagent, 95.0 – 98.0%
glass bottle
258105-500ML
ACS reagent, 95.0 – 98.0%
poly bottle
258105-500ML-GL
ACS reagent, 95.0 – 98.0%
glass bottle
258105-6X500ML
ACS reagent, 95.0 – 98.0%
poly bottle
258105-6X500ML-GL
ACS reagent, 95.0 – 98.0%
glass bottle
258105-2.5L
ACS reagent, 95.0 – 98.0%
poly bottle
258105-2.5L-GL
ACS reagent, 95.0 – 98.0%
glass bottle
258105-6X2.5L
ACS reagent, 95.0 – 98.0%
poly bottle
258105-6X2.5L-GL
ACS reagent, 95.0 – 98.0%
glass bottle
For larger volumes or bulk orders, contact sales at Chrom Tech for pricing.
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800.822.5242 | (MN) 952.431.6000
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S I G M A - A L D R I C H Acids
Trichloroacetic acid
ACS reagent, ≥99.0%
O
CAS Number 76-03-9 | Linear Formula Cl3CCOOH | Molecular Weight 163.39 | Beilstein Registry Number 970119
EC Number 200-927-2 | MDL Number MFCD00004177 | PubChem Substance ID 24900373
HO
This product is designated as a ACS Reagent, meeting the specifications of the ACS for
reagent chemicals. Trichloroacetic acid (TCA) is a reagent used for the precipitation of
proteins and nucleic acids. TCA is also used as a decalcifier and fixative in microscopy
CCl3
Synonym: TCA
S P EC I FI C ATI ONS
Grade:
Vapor Density:
Vapor Pressure:
Assay:
Impurities:
Ign. Residue:
Refractive Index:
BP:
MP:
Density:
Anion Traces:
Cation Traces:
Storage Temp.:
ACS reagent
<1 (vs air)
1 mmHg ( 51 °C)
≥99.0%
Substances darkened by sulfuric acid, passes test
≤0.01% insoluble matter
≤0.03%
n20/D 1.62(lit.)
196 °C(lit.)
54-58 °C(lit.)
1.62 g/mL at 25 °C(lit.)
chloride (Cl-): ≤0.002 ppm
nitrate (NO3-): ≤0.002%
phosphate (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.02%
Fe: ≤0.001%
heavy metals (as Pb): ≤0.002%
2-8°C
TRI C HLOROAC ETI C AC I D O R D E R IN G IN F O R M AT IO N
PART N O - PA C K S I ZE
G R A DE
CON TAIN ER
T6399-5G
ACS reagent, ≥99.0%
glass bottle
T6399-100G
ACS reagent, ≥99.0%
glass bottle
T6399-4X100G
ACS reagent, ≥99.0%
glass bottle
T6399-250G
ACS reagent, ≥99.0%
glass bottle
T6399-500G
ACS reagent, ≥99.0%
glass bottle
T6399-1KG
ACS reagent, ≥99.0%
glass bottle
For larger volumes or bulk orders, contact sales at Chrom Tech for pricing.
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