4-Pyridoxinic acid

  • 4-Pyridoxinecarboxylic acid
  • 3-Hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridinecarboxylic acid
  • 2-Methyl-3-hydroxy-4-carboxy-5-hydroxymethylpyridine
Formula
C8H9NO4
Structure
Description
Tan solid
Uses
A metabolite of vitamin B6 which is excreted in the urine.

Registry Numbers and Inventories.
CAS
82-82-6
EC (EINECS/ELINCS)
201-440-8
36/37/38
RTECS
NS1800000
RTECS class
Drug
Merck
12,8165
Beilstein/Gmelin
384006
Beilstein Reference
5-22-05-00379

Properties.
Formula
C8H9NO4
Formula mass
183.16
Melting point, °C
258 - 261
Boiling point, °C
376
Vapor pressure, mmHg
2E-14 (25 C)
Solubility in water
Very soluble
pKa/pKb
0.47 (pKa)
Partition coefficient, pKow
0.00
Heat of vaporization
91.9 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. Store in a cool dry place.
Protection
Rubber gloves. Chemical safety goggles.
Respirators
Government approved respirator.
Small spills/leaks
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide, Nitrogen oxides.

Fire.
Flash Point,°C
307
Fire fighting
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.

Health.
Exposure effects
Irritant. Irritating to eyes, respiratory system and skin.
   Ingestion
May be harmful if swallowed.
   Inhalation
Material is irritating to mucous membranes and upper respiratory tract.
   Skin
Skin irritant. May be harmful if absorbed through the skin.
   Eyes
Eye irritant.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water.
   Eyes
In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.

Transport.