CYANURIC ACID
C3N3(OH3)
MW: 129.08
METHOD: 5030, Issue 2
5030
CAS: 108-80-5
RTECS: XZ1800000
EVALUATION: PARTIAL
OSHA : no standard NIOSH: no recommended exposure limit ACGIH: no TLV
PROPERTIES:
Issue 1: 15 May 1989 Issue 2: 15 August 1994
solid; d 2.50 g/mL @ 20 °C; MP >330 °C; (decomposes to cyanic acid); VP not significant
SYNONYMS: 2,4,6-trihydroxy-1,3,5-triazine; isocyanuric acid; 1,3,5-triazine-2,4,6(1 H,3H,5H)trione.
SAMPLING SAMPLER:
Filter (5-µm PVC membrane)
FLOW RATE:
1 to 3 L/min
VOL-MIN: -MAX:
10 L @ 0.1 mg/m 3 1000 L
SHIPMENT:
routine
SAMPLE STABILITY:
≥ 69 days at 25 °C [1]
FIELD BLANKS:
2 to 10 field blanks per set
MEASUREMENT TECHNIQUE:
HPLC, UV DETECTION
ANALYTE:
cyanuric acid
EXTRACTION:
3 mL 0.005 M Na 2HPO 4, 5:95 (v:v) methanol:water (pH = 7.0), 10 min ultrasonic
INJECTION VOLUME:
ACCURACY RANGE STUDIED:
not studied
BIAS:
not determined
15 µL
MOBILE PHASE:
0.005 M Na 2HPO 4, 5:95 (v:v) methanol:water (pH = 7.0)
COLUMN:
µ-Bondapak C 18, 10-µm particle, size; Radial PAK cartridge, 11 cm x 8-mm ID
DETECTOR:
UV, 225 nm
CALIBRATION:
standard solutions of cyanuric acid in mobile phase
RANGE:
1 to 750 µg per sample
ESTIMATED LOD: 0.3 µg per sample ˆ ): not determined OVERALL PRECISION (S rT PRECISION (Sr): ACCURACY:
0.020 @ 12 to 412 µg per sample [1]
not determined
APPLICABILITY: The working range is 0.01 to 10 mg/m 3 for a 100-L air sample.
INTERFERENCES: Trichloroisocyanuric acid interferes because it reacts with water (which is present in the eluent used for recovery) to form cyanuric acid.
OTHER METHODS: None identified for air analysis. HPLC method for measurement in solution is a variation of the method of Briggle et al. [2].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
