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Physicochemical Information
Boiling point	211 °C (1013 hPa)
Density	1.44 g/cm3 (20 °C)
Flash point	157 °C
Ignition temperature	500 °C
Melting Point	158 – 160 °C
pH value	2.4 (H₂O, 20 °C) (saturated solution)
Vapor pressure	1 hPa (114 °C)
Bulk density	400 – 500 kg/m3
Solubility	2 g/l

Toxicological Information
LD 50 oral	LD50 Rat 1250 – 1580 mg/kg
LD 50 dermal	LD50 Rat > 2000 mg/kg

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H302: Harmful if swallowed. H318: Causes serious eye damage. H361d: Suspected of damaging the unborn child.
Precautionary Statement(s)	P202: Do not handle until all safety precautions have been read and understood. P264: Wash skin thoroughly after handling. P280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection. P301 + P312: IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P308 + P313: IF exposed or concerned: Get medical advice/ attention.
Signal Word	Danger
RTECS	VO0525000
Storage class	10 – 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water
Disposal	3 Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

Safety Information
Categories of danger	harmful, irritant

Storage and Shipping Information
Storage	Store at +15°C to +25°C.

Specifications
Assay (acidimetric; calculated on dried substance)	99.5 – 100.5 %
Assay (HPLC, calc.on dried substance)	98.0 – 102.0 %
Identity	passes test
Appearance of solution (10 %; ethanol 96 %)	passes test
Chloride (Cl)	≤ 0.0100 %
Sulfate (SO₄)	≤ 0.0200 %
Related substances / HPLC (EP) (4-Hydroxybenzoic acid)	≤ 0.1 %
Related substances / HPLC (EP) (4-Hydroxyisophthalic acid)	≤ 0.05 %
Related substances / HPLC (EP) (Phenol)	≤ 0.02 %
Related substances / HPLC (EP) (Largest unspecified impurity)	≤ 0.05 %
Related substances / HPLC (EP) (Sum of all impurities)	≤ 0.2 %
Related substances / HPLC (USP) (4-Hydroxybenzoic acid)	≤ 0.1 %
Related substances / HPLC (USP) (4-Hydroxyisophthalic acid)	≤ 0.05 %
Related substances / HPLC (USP) (Phenol)	≤ 0.02 %
Related substances / HPLC (USP) (Largest unspecified impurity)	≤ 0.05 %
Related substances / HPLC (USP) (Sum of all impurities)	≤ 0.2 %
Residual solvents (ICH Q3C)	excluded by manufacturing process
Sulfated ash	≤ 0.05 %
Loss on drying	≤ 0.5 %
Elemental impurity specifications have been set considering ICH Q3D (Guideline for Elemental impurities). Class 1-3 elements are not likely to be present above the ICH Q3D option 1 limit, unless specified and indicated (*). corresponds to Ph Eur, BP, USP

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