CAPS (buffer)

CAPS[1]

Names
Preferred IUPAC name

3-(Cyclohexylamino)propane-1-sulfonic acid

Identifiers

CAS Number

* 1135-40-6 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 63979 Y

DrugBank |

* DB02219

EC Number |

* 214-492-1

PubChem CID

* 70815

UNII |

* 4W981O1LXP

InChI

* InChI=1S/C9H19NO3S/c11-14(12,13)8-4-7-10-9-5-2-1-3-6-9/h9-10H,1-8H2,(H,11,12,13) N

Key: PJWWRFATQTVXHA-UHFFFAOYSA-N N

* InChI=1/C9H19NO3S/c11-14(12,13)8-4-7-10-9-5-2-1-3-6-9/h9-10H,1-8H2,(H,11,12,13)

Key: PJWWRFATQTVXHA-UHFFFAOYAU

SMILES

* C1CCC(CC1)NCCCS(=O)(=O)O

Properties

Chemical formula

| C9H19NO3S
Molar mass | 221.32 g/mol
Melting point | >300 °C
Acidity (pKa)  | 10.4[2]
Hazards
GHS pictograms |
GHS Signal word | Warning

GHS hazard statements

| H302, H315, H319, H335

GHS precautionary statements

| P261, P264, P270, P271, P280, P301+312, P302+352, P304+340, P305+351+338, P312, P321, P330, P332+313, P337+313, P362, P403+233, P405, P501

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

N verify (what is YN ?)
Infobox references

CAPS is the common name for N-cyclohexyl-3-aminopropanesulfonic acid, a chemical used as buffering agent in biochemistry. The similar substance N-cyclohexyl-2-hydroxyl-3-aminopropanesulfonic acid (CAPSO) is also used as buffering agent in biochemistry. Its useful pH range is 9.7-11.1.

## See also

* CHES
* Good's buffers § List of Good's buffers

## References

1. ↑ CAPS at Sigma-Aldrich
2. ↑ Esplin, Taran L.; Cable, Morgan L.; Gray, Harry B.; Ponce, Adrian (2010). "Terbium-Macrocycle Complexes as Chemical Sensors: Detection of an Aspirin Metabolite in Urine Using a Salicylurate-Specific Receptor Site". Inorganic Chemistry 49 (10): 4643–4647. doi:10.1021/ic1003066.
Tabata, Masaaki; Habib, Ahsan; Watanabe, Keiichi (2005). "DNA Cleavage by Good’s Buffers in the Presence of Au(III)". Bulletin of the Chemical Society of Japan 78 (7): 1263–1269. doi:10.1246/bcsj.78.1263.

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*[CID]: Compound ID
*[H302]: Harmful if swallowed
*[H315]: Causes skin irritation
*[H319]: Causes serious eye irritation
*[H335]: May cause respiratory irritation
*[P261]: Avoid breathing dust/fume/gas/mist/vapours/spray
*[P264]: Wash … thoroughly after handling
*[P270]: Do not eat, drink or smoke when using this product
*[P271]: Use only outdoors or in a well-ventilated area
*[P280]: Wear protective gloves/protective clothing/eye protection/face protection
*[P301+312]: IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
*[P302+352]: IF ON SKIN: Wash with soap and water
*[P304+340]: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
*[P305+351+338]: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing
*[P312]: Call a POISON CENTER or doctor/physician if you feel unwell
*[P321]: Specific treatment (see … on this label)
*[P330]: Rinse mouth
*[P332+313]: If skin irritation occurs: Get medical advice/attention
*[P337+313]: Get medical advice/attention
*[P362]: Take off contaminated clothing and wash before reuse
*[P403+233]: Store in a well ventilated place. Keep container tightly closed
*[P405]: Store locked up
*[P501]: Dispose of contents/container to …