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438073 Sigma-Aldrich

Nitric acid

ACS reagent, 70%

  • CAS Number 7697-37-2

  • Empirical Formula (Hill Notation) HNO3

  • Molecular Weight 63.01

  •  EC Number 231-714-2

  •  MDL number MFCD00011349

  •  eCl@ss 38060304

  •  PubChem Substance ID 329756406

  •  NACRES NA.21

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Properties

Related Categories ACS Grade Acids & Bases, Acids, Acids & Bases, Analytical Reagents, Analytical Reagents for General Use,
Quality Level   200
grade   ACS reagent
vapor pressure   8 mmHg ( 20 °C)
assay   68.0-70.0% (ACS specification)
  70%
form   liquid
ign. residue   ≤5 ppm
color   APHA: ≤10
pH   < 1.0
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 ppm
storage temp.   room temp
SMILES string   O[N+]([O-])=O
InChI   1S/HNO3/c2-1(3)4/h(H,2,3,4)
InChI key   GRYLNZFGIOXLOG-UHFFFAOYSA-N

Description

General description

Nitric acid (HNO3) is a highly corrosive mineral acid. It is usually utilized for abstracting transition metal catalyst from single-walled carbon nanotubes (SWNTs) in order to purify them. The effect of nitric acid on the oxidation of multiwalled carbon nanotubes (MWCNTs) has been investigated by sample weight, Raman spectrum, solubility, morphology and alignment examinations.

Application

Nitric acid was used to increase the number of acid sites by altering the surface of activated carbon.
It may be used:
• In combination with acetic anhydride and zeolite catalysts for the preparation of p-nitrotoluene with high regioselectivity.
• In the pretreatment of rice straw for enhanced production of xylose.
• To minimize the extent of cation ordering in LiNi0.5Mn1.5O4, a transition metal-substituted spinel material, by surface treatment.

Packaging

100 mL in glass bottle

2.2 L in poly bottle

2.5, 6×2.5 L in PVC-coated bottle

500, 6×500 mL in PVC-coated bottle

Other Notes

SKU-Pack sizes with -P are packaged in poly bottles

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Supplemental Hazard Statements 
EUH071
RIDADR 
UN2031 - class 8 (5.1) - PG 2 - IATA PAX forbidden - Nitric acid >=65% - <= 70%
WGK Germany 
WGK 2
RTECS 
QU5775000
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles

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Peer-Reviewed Papers
15

References

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