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Guanidine

IUPAC: guanidine

CH5N3 Bases & Alkalis CAS 113-00-8
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Quick Reference
Formula / NotationCH5N3
CAS Number113-00-8
Molecular Weight59.07
Melting Point50 °C
Solubility1840 mg/L (at 20 °C)
AppearanceDeliquescent solid; Absorbs carbon dioxide from the air; [Merck Index]
Also Known As113-00-8; Iminourea; Carbamidine; Aminomethanamidine; Carbamamidine; Imidourea; Aminoformamidine; Guanidin; JU58VJ6Y3B; CHEBI:42820
CategoryBases & Alkalis

What is Guanidine?

Guanidine is an aminocarboxamidine, the parent compound of the guanidines. It is a member of guanidines, a carboxamidine and a one-carbon compound. It is a conjugate base of a guanidinium.

Formula & Notation

CH5N3

IUPAC Name: guanidine

Other Names / Synonyms: 113-00-8; Iminourea; Carbamidine; Aminomethanamidine; Carbamamidine; Imidourea; Aminoformamidine; Guanidin; JU58VJ6Y3B; CHEBI:42820

Properties & Characteristics

Appearance: Deliquescent solid; Absorbs carbon dioxide from the air; [Merck Index]. Molecular formula: CH5N3. Molecular weight: 59.07 g/mol. Melting point: 50 °C. Solubility: 1840 mg/L (at 20 °C). Vapor pressure: 4.1 [mmHg]. LogP: -1.3.

Physical Data

PropertyValue
Melting Point50 °C
Molecular Weight59.07
Solubility1840 mg/L (at 20 °C)
AppearanceDeliquescent solid; Absorbs carbon dioxide from the air; [Merck Index]

Uses & Applications

Used in chemical manufacturing, pH adjustment, saponification, water treatment, and as a laboratory reagent.

Safety Information

Corrosive or irritant. Causes burns to skin and eyes. Store away from acids. Wear protective gloves and goggles. Consult SDS before use.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Guanidine
Formula CH5N3
CAS Number 113-00-8
Molecular Weight 59.07
Category Bases & Alkalis
Synonyms 113-00-8; Iminourea; Carbamidine; Aminomethanamidine; Carbamamidine; Imidourea; Aminoformamidine; Guanidin; JU58VJ6Y3B; CHEBI:42820

Frequently Asked Questions

Guanidine is an aminocarboxamidine, the parent compound of the guanidines. It is a member of guanidines, a carboxamidine and a one-carbon compound. It is a conjugate base of a guanidinium.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.