Molecule structure of Sodium hydroxymethanesulfinate (CAS NO.149-44-0):

IUPAC Name: Sodium hydroxymethanesulfinate 
Molecular Weight: 118.08749 g/mol
Molecular Formula: CH₃NaO₃S 
Melting Point: ~120 °C (dec.)
Flash Point: 223.8 °C
Enthalpy of Vaporization: 81.3 kJ/mol
Boiling Point: 446.4 °C at 760 mmHg
Vapour Pressure: 7.6E-10 mmHg at 25 °C 
Solubility H₂O: 50 mg/mL, clear, colorless
H-Bond Donor: 1
H-Bond Acceptor: 3
Rotatable Bond Count: 1
Exact Mass: 117.970059
MonoIsotopic Mass: 117.970059
Topological Polar Surface Area: 60.4
Canonical SMILES: C(O)S(=O)[O-].[Na+]
InChI: InChI=1S/CH4O3S.Na/c2-1-5(3)4;/h2H,1H2,(H,3,4);/q;+1/p-1
InChIKey: XWGJFPHUCFXLBL-UHFFFAOYSA-M
EINECS: 205-739-4 
Classification Code: Mutation data; TSCA Flag T [Subject to the Section 4 test rule under TSCA]

  Sodium hydroxymethanesulfinate (CAS NO.149-44-0) is used for printing and dyeing agent, styrene butadiene rubber, and synthetic resin activator, bleaching, and bleach of organic.

Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.
WGK Germany: 1
RTECS: PB0380000
Moderately toxic by ingestion. When heated to decomposition it emits toxic fumes of SO_x and Na₂O. See also FORMALDEHYDE and SULFITES.

 Sodium hydroxymethanesulfinate (CAS NO.149-44-0) is also named as AI3-23202 ; Aldanil ; Bleachit D ; CCRIS 3898 ; Discolite ; Formaldehyde sodium bisulfite adduct ; Formaldehyde sodium sulfoxylate ; Formaldehydesulfoxylic acid sodium salt ; Formapon ; Formopan ; HSDB 5648 ; Hydrolit ; Hydrosulfite AWC ; Hydroxymethanesulfinic acid sodium salt ; Hydroxymethansulfinsaeure, natriumsalz ; Leptacid ; Leptacit ; NSC 4847 ; Natrium formaldehydesulfoxylat ; Natrium hydroxymethansulfinat ; Oxymethansulfinsaeuren natrium ; Oxymethansulfinsaeuren natrium [German] ; Redol C ; Rodite ; Rongalit ; Rongalit C ; Rongalite ; Rongalite C ; Sodium (hydroxymethyl)sulfinate ; Sodium formaldehyde sulfoxylate ; Sodium methanalsulfoxylate ; Sodium oxymethanesulfinic acid ; Sodium sulfoxylate formaldehyde ; Sodium sulfoxylate formaldehyde (anhydrous) ; Superlite C ; UNII-X4ZGP7K714 . Sodium hydroxymethanesulfinate (CAS NO.149-44-0) is translucent white orthorhombic crystals or small pieces. It is soluble in water, slightly soluble in alcohol. It is stable and incompatible with strong oxidizing agents. It has strong reducing at high temperatures. Sodium hydroxymethanesulfinate will decomposite with acid. It is toxic. It is flammable by heat. So the storage environment should be ventilate, low-temperature and dry. Keep Sodium hydroxymethanesulfinate separate from raw materials of food and oxidant.