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Merck
CN

HT501320

Sigma-Aldrich

Formalin solution, neutral buffered, 10%

histological tissue fixative

Synonym(s):

10% Neutral Buffered Formalin, 10% NBF, Formaldehyde, Methanal

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About This Item

MDL number:
UNSPSC Code:
12171500
PubChem Substance ID:
NACRES:
NA.47
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biological source

synthetic

concentration

10% formalin (approx. 4% formaldehyde)

color

colorless

pH

6.90-7.10

density

1.080 g/cm3

application(s)

hematology
histology

storage temp.

room temp

SMILES string

[O-]#[C+H2]

InChI

1S/CH2O/c1-2/h1H2

InChI key

WSFSSNUMVMOOMR-UHFFFAOYSA-N

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General description

10% Neutral Buffered Formalin is the most used fixative throughout the world for light microscopy. Formalin solution is the commercially obtained solution containing 37% w/w (40% w/v) of formaldehyde in water. It requires a relatively short period of fixation. It is suitable for the long-term storage of tissue. Once properly fixed, the tissue should be able to withstand the subsequent stages of tissue processing or staining.

Application

Formalin solution (neutral buffered, 10%) has been popularly used as a general-purpose histological fixative to fix tissue samples.
  • It effectively preserves the cellular and tissue morphology, maintaining the structural integrity required for microscopic examination.
  • It is used for routine histological staining, providing clear and detailed images of cellular structures.
Popular general purpose histological fixative.

Biochem/physiol Actions

Formaldehyde is both a non-coagulant and an additive fixative. Formalin fixation is thought to form cross links between the aldehydes and the proteins, creating a gel, thus retaining cellular constituents in their in vivo relationship. Formaldehyde is known to penetrate tissue quickly, but the fixation process may take a long time to form the various cross links with tissue proteins.

Features and Benefits

  • 10% NBF is well-suited for large throughput laboratories.
  • It requires a relatively short period of fixation.
  • It can be used for the long-term storage of tissue.

Packaging

Item is packaged in a 10L Cubitainer consisting of a plastic bladder inside of a cardboard box with an attached spigot.

Physical form

Neutral buffered solution

Pictograms

Health hazardExclamation mark

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Carc. 1B - Muta. 2 - Skin Sens. 1

WGK

WGK 3

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Histological and Histochemical Methods ? Theory and practice, 5th Edition
J. A. Kiernan
Histological and Histochemical Methods: Theory and Practice (2015)
Ted M Hsu et al.
Proceedings of the National Academy of Sciences of the United States of America, 117(48), 30744-30754 (2020-11-18)
Thirst is a highly potent drive that motivates organisms to seek out and consume balance-restoring stimuli. The detection of dehydration is well understood and involves signals of peripheral origin and the sampling of internal milieu by first order homeostatic neurons
Recapitulating spatiotemporal tumor heterogeneity in vitro through engineered breast cancer microtissues.
Mazio C, et al.
Acta Biomaterialia, 73, 236-249 (2018)
Quantifying size and number of adipocytes in adipose tissue.
Parlee S D, et al.
Methods in Enzymology, 537, 93-122 (2014)
Comparison of partially and fully chemically-modified siRNA in conjugate-mediated delivery in vivo.
Hassler M R, et al.
Nucleic Acids Research, 46(5), 2185-2196 (2018)

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