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Merck
CN

HT501640

Sigma-Aldrich

Formalin solution, neutral buffered, 10%

histological tissue fixative

Synonym(s):

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

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About This Item

MDL number:
UNSPSC Code:
12352114
PubChem Substance ID:
NACRES:
NA.47
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Quality Level

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 helps to preserve tissue samples by preventing decay and maintaining their molecular integrity.
  • 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 20 L 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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Weindel C G, et al
Autophagy, 11(5), 1010-1024 (2015)
Histological and Histochemical Methods ? Theory and practice, 5th Edition
J. A. Kiernan
Histological and Histochemical Methods: Theory and Practice (2015)
Autophagy in Dendritic Cells and B Cells Is Critical for the Inflammatory State of TLR7-Mediated Autoimmunity.
Weindel C G, et al.
Journal of Immunology, 198, 1081-1092 (2016)
Ming-Kai Hsieh et al.
Scientific reports, 10(1), 10441-10441 (2020-06-28)
Screw loosening due to broken pedicles is a common complication resulting from the insertion of screws either with inadequate diameters or into an osteoporotic pedicle. In this novel in vitro study, we tried to clarify the contribution of the pedicle
René J Buesa
Annals of diagnostic pathology, 12(6), 387-396 (2008-11-11)
Because formalin is toxic, carcinogenic, and a poor preserver of nucleic acids, for more than 20 years, there have been numerous attempts to find a substitute, with as many different alternative fixatives, none totally successful. With a fast penetration, formaldehyde

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